<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Teleportation_and_superdense_coding_-_a_historical_anecdote" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Teleportation and superdense coding - a historical anecdote</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Teleportation and superdense coding - a historical anecdote</h3> <div id="video_U2L1a" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:6zLPANfn6kg&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1a"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">The Origins of Quantum Teleportation - Charles Bennett</h3> <div id="video_U2L1a_bennett" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1a_bennett/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:00ZvkPgy7-Y&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1a_bennett"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-2" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@More_about_the_history_of_quantum_teleporation_-_at_IBM"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@More_about_the_history_of_quantum_teleporation_-_at_IBM" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <p><big class="xlarge">More about the history of quantum teleporation - at IBM</big></p><p> Read more about <a href="https://researcher.watson.ibm.com/researcher/view_group.php?id=2862" target="_blank">the history of quantum teleporation</a>, and how it was invented and first demonstrated by Charles Bennett, John Smolin, and colleagues at IBM in Yorktown. </p><html url_name="site_search_box1"/> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_teleportation_-_protocol_overview" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum teleportation - protocol overview</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum teleportation - protocol overview</h3> <div id="video_U2L1b" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1b/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:DSE3jKW5y7A&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1b"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box2"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box2" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_superdense_coding_-_protocol_overview" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum superdense coding - protocol overview</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum superdense coding - protocol overview</h3> <div id="video_U2L1c" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1c/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:vJdoER1tw0o&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1c"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box3"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box3" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@The_Bell_basis_measurement" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">The Bell basis measurement</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">The Bell basis measurement</h3> <div id="video_U2L1d" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1d/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:ETkTSDAecZA&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1d"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box4"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box4" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! 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<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@CQ_Bell_basis_measurement_circuit" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">CQ: Bell basis measurement circuit</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ"> <div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="problem" data-has-score="True" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Problem"} </script> <div id="problem_u2_1_cq_bb_meas_circ" class="problems-wrapper" role="group" aria-labelledby="u2_1_cq_bb_meas_circ-problem-title" data-problem-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ" data-url="/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ/handler/xmodule_handler" data-problem-score="0" data-problem-total-possible="1" data-attempts-used="0" data-content=" &lt;h3 class=&#34;hd hd-3 problem-header&#34; id=&#34;u2_1_cq_bb_meas_circ-problem-title&#34; aria-describedby=&#34;block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ-problem-progress&#34; tabindex=&#34;-1&#34;&gt; Bell basis measurement circuit &lt;/h3&gt; &lt;div class=&#34;problem-progress&#34; id=&#34;block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_bb_meas_circ-problem-progress&#34;&gt;&lt;/div&gt; &lt;div class=&#34;problem&#34;&gt; &lt;div&gt; &lt;p&gt; This is a concept question, provided to double-check your understanding of the previous video clip. &lt;/p&gt; &lt;p&gt; Suppose you wish to construct a quantum circuit such that measuring qubits [mathjaxinline]|ab\rangle[/mathjaxinline] of the four Bell states produce results [mathjaxinline]xy = 00, 01, 10, 11[/mathjaxinline], according to: &lt;/p&gt; &lt;table id=&#34;a0000000002&#34; class=&#34;eqnarray&#34; cellspacing=&#34;0&#34; cellpadding=&#34;7&#34; width=&#34;100%&#34; style=&#34;table-layout:auto&#34;&gt; &lt;tr id=&#34;a0000000003&#34;&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:right; border:none&#34;&gt; [mathjaxinline]\displaystyle |\Phi ^+\rangle[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:center; border:none&#34;&gt; [mathjaxinline]\displaystyle =[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:left; border:none&#34;&gt; [mathjaxinline]\displaystyle \frac{|00\rangle + |11\rangle }{\sqrt{2}} \longrightarrow xy = 00[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td class=&#34;eqnnum&#34; style=&#34;width:20%; border:none;text-align:right&#34;&gt;(1.1)&lt;/td&gt; &lt;/tr&gt; &lt;tr id=&#34;a0000000004&#34;&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:right; border:none&#34;&gt; [mathjaxinline]\displaystyle |\Phi ^-\rangle[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:center; border:none&#34;&gt; [mathjaxinline]\displaystyle =[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:left; border:none&#34;&gt; [mathjaxinline]\displaystyle \frac{|00\rangle - |11\rangle }{\sqrt{2}} \longrightarrow xy = 10[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td class=&#34;eqnnum&#34; style=&#34;width:20%; border:none;text-align:right&#34;&gt;(1.2)&lt;/td&gt; &lt;/tr&gt; &lt;tr id=&#34;a0000000005&#34;&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:right; border:none&#34;&gt; [mathjaxinline]\displaystyle |\Psi ^+\rangle[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:center; border:none&#34;&gt; [mathjaxinline]\displaystyle =[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:left; border:none&#34;&gt; [mathjaxinline]\displaystyle \frac{|01\rangle + |10\rangle }{\sqrt{2}} \longrightarrow xy = 01[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td class=&#34;eqnnum&#34; style=&#34;width:20%; border:none;text-align:right&#34;&gt;(1.3)&lt;/td&gt; &lt;/tr&gt; &lt;tr id=&#34;a0000000006&#34;&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:right; border:none&#34;&gt; [mathjaxinline]\displaystyle |\Psi ^-\rangle[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:center; border:none&#34;&gt; [mathjaxinline]\displaystyle =[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:left; border:none&#34;&gt; [mathjaxinline]\displaystyle \frac{|01\rangle - |10\rangle }{\sqrt{2}} \longrightarrow xy = 11 \, .[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td class=&#34;eqnnum&#34; style=&#34;width:20%; border:none;text-align:right&#34;&gt;(1.4)&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;p&gt; Note that these assigments of [mathjaxinline]x[/mathjaxinline] and [mathjaxinline]y[/mathjaxinline] may be different from what you find elsewhere (e.g. in Nielsen &amp;amp; Chuang); that is deliberate, so you think a bit harder about the circuit. &lt;/p&gt; &lt;p&gt; Complete the following quantum circuit to implement the desired measurement, by placing the Hadamard gates ([mathjaxinline]H[/mathjaxinline]) and identity gates ([mathjaxinline]I[/mathjaxinline]) where appropriate, around the CNOT gate which has qubit [mathjaxinline]b[/mathjaxinline] as its control, and qubit [mathjaxinline]a[/mathjaxinline] as its target: &lt;/p&gt; &lt;span&gt; &lt;div class=&#34;wrapper-problem-response&#34; tabindex=&#34;-1&#34; aria-label=&#34;Question 1&#34; role=&#34;group&#34;&gt;&lt;div id=&#34;inputtype_u2_1_cq_bb_meas_circ_2_1&#34; class=&#34;capa_inputtype&#34;&gt; &lt;div class=&#34;drag_and_drop_problem_div&#34; 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String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_teleportation_-_full_protocol_and_quantum_circuit" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum teleportation - full protocol and quantum circuit</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum teleportation - full protocol and quantum circuit</h3> <div id="video_U2L1e" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1e/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:DuUpnxgQ1Vk&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1e"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box5"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box5" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_teleportation_-_quantum_circuit_analysis_I" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum teleportation - quantum circuit analysis I</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum teleportation - quantum circuit analysis I</h3> <div id="video_U2L1f" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1f/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:i8l9qrXJufc&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1f"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box6"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box6" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_teleportation_-_quantum_circuit_analysis_II" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum teleportation - quantum circuit analysis II</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum teleportation - quantum circuit analysis II</h3> <div id="video_U2L1g" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1g/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:NaLXZkiOiR4&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1g"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box7"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box7" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! 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<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@CQ_Teleportation_circuit" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">CQ: Teleportation circuit</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_teleport_circ"> <div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="problem" data-has-score="True" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_teleport_circ" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Problem"} </script> <div id="problem_u2_1_cq_teleport_circ" class="problems-wrapper" role="group" aria-labelledby="u2_1_cq_teleport_circ-problem-title" data-problem-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_teleport_circ" data-url="/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_teleport_circ/handler/xmodule_handler" data-problem-score="0" data-problem-total-possible="1" data-attempts-used="0" data-content=" &lt;h3 class=&#34;hd hd-3 problem-header&#34; 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<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_superdense_coding_-_protocol_detail_and_analysis" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum superdense coding - protocol detail and analysis</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum superdense coding - protocol detail and analysis</h3> <div id="video_U2L1h" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1h/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:zcPS0lYwJa4&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1h"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. 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String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@CQ_Superdense_coding_with_three_qubits" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">CQ: Superdense coding with three qubits</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit"> <div class="xblock xblock-public_view xblock-public_view-problem xmodule_display xmodule_ProblemBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="problem" data-has-score="True" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Problem"} </script> <div id="problem_u2_1_cq_densetrit" class="problems-wrapper" role="group" aria-labelledby="u2_1_cq_densetrit-problem-title" data-problem-id="block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit" data-url="/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit/handler/xmodule_handler" data-problem-score="0" data-problem-total-possible="1" data-attempts-used="0" data-content=" &lt;h3 class=&#34;hd hd-3 problem-header&#34; id=&#34;u2_1_cq_densetrit-problem-title&#34; aria-describedby=&#34;block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit-problem-progress&#34; tabindex=&#34;-1&#34;&gt; Superdense coding with three qubits &lt;/h3&gt; &lt;div class=&#34;problem-progress&#34; id=&#34;block-v1:MITx+8.370.2x+1T2018+type@problem+block@u2_1_cq_densetrit-problem-progress&#34;&gt;&lt;/div&gt; &lt;div class=&#34;problem&#34;&gt; &lt;div&gt; &lt;p&gt; This is a concept question, provided to double-check your understanding of the previous video clip. &lt;/p&gt; &lt;p&gt; In lecture, Prof. Shor describes how superdense coding allows Alice to send two bits of information to Bob, by transferring just one qubit to Bob, assuming this qubit is part of a previously shared EPR pair of qubits. &lt;/p&gt; &lt;p&gt; Suppose Alice and Bob share three qubits, such as the Greenberger-Horne-Zeilinger (&amp;#8220;GHZ&#34;) state &lt;/p&gt; &lt;table id=&#34;a0000000007&#34; class=&#34;eqnarray&#34; cellspacing=&#34;0&#34; cellpadding=&#34;7&#34; width=&#34;100%&#34; style=&#34;table-layout:auto&#34;&gt; &lt;tr id=&#34;a0000000008&#34;&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td style=&#34;vertical-align:middle; text-align:right; border:none&#34;&gt; [mathjaxinline]\displaystyle \frac{|000\rangle + |111\rangle }{\sqrt{2}} \, ,[/mathjaxinline] &lt;/td&gt; &lt;td style=&#34;width:40%; border:none&#34;&gt;&amp;#160;&lt;/td&gt; &lt;td class=&#34;eqnnum&#34; style=&#34;width:20%; border:none;text-align:right&#34;&gt;(1.5)&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt; &lt;p&gt; with Alice holding the first qubit, and Bob the second and third qubits. &lt;/p&gt; &lt;p&gt; How many bits of classical information can Alice send to Bob, by sending her single qubit to Bob, and why? &lt;/p&gt; &lt;p&gt; &lt;div class=&#34;wrapper-problem-response&#34; tabindex=&#34;-1&#34; aria-label=&#34;Question 1&#34; role=&#34;group&#34;&gt;&lt;div class=&#34;choicegroup capa_inputtype&#34; id=&#34;inputtype_u2_1_cq_densetrit_2_1&#34;&gt; &lt;fieldset aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;div class=&#34;field&#34;&gt; &lt;input type=&#34;checkbox&#34; name=&#34;input_u2_1_cq_densetrit_2_1[]&#34; id=&#34;input_u2_1_cq_densetrit_2_1_choice_0&#34; class=&#34;field-input input-checkbox&#34; value=&#34;choice_0&#34;/&gt;&lt;label id=&#34;u2_1_cq_densetrit_2_1-choice_0-label&#34; for=&#34;input_u2_1_cq_densetrit_2_1_choice_0&#34; class=&#34;response-label field-label label-inline&#34; aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;text&gt;Only one bit of classical information, because of Holevo&#39;s theorem&lt;/text&gt; &lt;/label&gt; &lt;/div&gt; &lt;div class=&#34;field&#34;&gt; &lt;input type=&#34;checkbox&#34; name=&#34;input_u2_1_cq_densetrit_2_1[]&#34; id=&#34;input_u2_1_cq_densetrit_2_1_choice_1&#34; class=&#34;field-input input-checkbox&#34; value=&#34;choice_1&#34;/&gt;&lt;label id=&#34;u2_1_cq_densetrit_2_1-choice_1-label&#34; for=&#34;input_u2_1_cq_densetrit_2_1_choice_1&#34; class=&#34;response-label field-label label-inline&#34; aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;text&gt;Two bits of information, because it&#39;s just like superdense coding, despite the extra qubit&lt;/text&gt; &lt;/label&gt; &lt;/div&gt; &lt;div class=&#34;field&#34;&gt; &lt;input type=&#34;checkbox&#34; name=&#34;input_u2_1_cq_densetrit_2_1[]&#34; id=&#34;input_u2_1_cq_densetrit_2_1_choice_2&#34; class=&#34;field-input input-checkbox&#34; value=&#34;choice_2&#34;/&gt;&lt;label id=&#34;u2_1_cq_densetrit_2_1-choice_2-label&#34; for=&#34;input_u2_1_cq_densetrit_2_1_choice_2&#34; class=&#34;response-label field-label label-inline&#34; aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;text&gt;Three bits of information, because they share three qubits&lt;/text&gt; &lt;/label&gt; &lt;/div&gt; &lt;div class=&#34;field&#34;&gt; &lt;input type=&#34;checkbox&#34; name=&#34;input_u2_1_cq_densetrit_2_1[]&#34; id=&#34;input_u2_1_cq_densetrit_2_1_choice_3&#34; class=&#34;field-input input-checkbox&#34; value=&#34;choice_3&#34;/&gt;&lt;label id=&#34;u2_1_cq_densetrit_2_1-choice_3-label&#34; for=&#34;input_u2_1_cq_densetrit_2_1_choice_3&#34; class=&#34;response-label field-label label-inline&#34; aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;text&gt;Four bits of information, because Bob holds two qubits&lt;/text&gt; &lt;/label&gt; &lt;/div&gt; &lt;div class=&#34;field&#34;&gt; &lt;input type=&#34;checkbox&#34; name=&#34;input_u2_1_cq_densetrit_2_1[]&#34; id=&#34;input_u2_1_cq_densetrit_2_1_choice_4&#34; class=&#34;field-input input-checkbox&#34; value=&#34;choice_4&#34;/&gt;&lt;label id=&#34;u2_1_cq_densetrit_2_1-choice_4-label&#34; for=&#34;input_u2_1_cq_densetrit_2_1_choice_4&#34; class=&#34;response-label field-label label-inline&#34; aria-describedby=&#34;status_u2_1_cq_densetrit_2_1&#34;&gt; &lt;text&gt;Eight bits of information, because three qubits can be in eight possible orthogonal states&lt;/text&gt; &lt;/label&gt; &lt;/div&gt; &lt;span id=&#34;answer_u2_1_cq_densetrit_2_1&#34;/&gt; &lt;/fieldset&gt; &lt;div class=&#34;indicator-container&#34;&gt; &lt;span class=&#34;status unanswered&#34; id=&#34;status_u2_1_cq_densetrit_2_1&#34; data-tooltip=&#34;Not yet answered.&#34;&gt; &lt;span class=&#34;sr&#34;&gt;unanswered&lt;/span&gt;&lt;span class=&#34;status-icon&#34; aria-hidden=&#34;true&#34;/&gt; &lt;/span&gt; &lt;/div&gt; &lt;/div&gt;&lt;/div&gt; &lt;/p&gt; &lt;/div&gt; &lt;div class=&#34;action&#34;&gt; &lt;input type=&#34;hidden&#34; name=&#34;problem_id&#34; value=&#34;Superdense coding with three qubits&#34; /&gt; &lt;div class=&#34;submit-attempt-container&#34;&gt; &lt;button type=&#34;button&#34; class=&#34;submit btn-brand&#34; data-submitting=&#34;Submitting&#34; data-value=&#34;Submit&#34; data-should-enable-submit-button=&#34;True&#34; aria-describedby=&#34;submission_feedback_u2_1_cq_densetrit&#34; &gt; &lt;span class=&#34;submit-label&#34;&gt;Submit&lt;/span&gt; &lt;/button&gt; &lt;div class=&#34;submission-feedback&#34; id=&#34;submission_feedback_u2_1_cq_densetrit&#34;&gt; &lt;span class=&#34;sr&#34;&gt;Some problems have options such as save, reset, hints, or show answer. These options follow the Submit button.&lt;/span&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class=&#34;problem-action-buttons-wrapper&#34;&gt; &lt;span class=&#34;problem-action-button-wrapper&#34;&gt; &lt;button type=&#34;button&#34; class=&#34;save problem-action-btn btn-default btn-small&#34; data-value=&#34;Save&#34;&gt; &lt;span class=&#34;icon fa fa-floppy-o&#34; aria-hidden=&#34;true&#34;&gt;&lt;/span&gt; &lt;span aria-hidden=&#34;true&#34;&gt;Save&lt;/span&gt; &lt;span class=&#34;sr&#34;&gt;Save your answer&lt;/span&gt; &lt;/button&gt; &lt;/span&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class=&#34;notification warning notification-gentle-alert is-hidden&#34; tabindex=&#34;-1&#34;&gt; &lt;span class=&#34;icon fa fa-exclamation-circle&#34; aria-hidden=&#34;true&#34;&gt;&lt;/span&gt; &lt;span class=&#34;notification-message&#34; aria-describedby=&#34;u2_1_cq_densetrit-problem-title&#34;&gt; &lt;/span&gt; &lt;div class=&#34;notification-btn-wrapper&#34;&gt; &lt;button type=&#34;button&#34; class=&#34;btn btn-default btn-small notification-btn review-btn sr&#34;&gt;Review&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class=&#34;notification warning notification-save is-hidden&#34; tabindex=&#34;-1&#34;&gt; &lt;span class=&#34;icon fa fa-save&#34; aria-hidden=&#34;true&#34;&gt;&lt;/span&gt; &lt;span class=&#34;notification-message&#34; aria-describedby=&#34;u2_1_cq_densetrit-problem-title&#34;&gt;None &lt;/span&gt; &lt;div class=&#34;notification-btn-wrapper&#34;&gt; &lt;button type=&#34;button&#34; class=&#34;btn btn-default btn-small notification-btn review-btn sr&#34;&gt;Review&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; &lt;div class=&#34;notification general notification-show-answer is-hidden&#34; tabindex=&#34;-1&#34;&gt; &lt;span class=&#34;icon fa fa-info-circle&#34; aria-hidden=&#34;true&#34;&gt;&lt;/span&gt; &lt;span class=&#34;notification-message&#34; aria-describedby=&#34;u2_1_cq_densetrit-problem-title&#34;&gt;Answers are displayed within the problem &lt;/span&gt; &lt;div class=&#34;notification-btn-wrapper&#34;&gt; &lt;button type=&#34;button&#34; class=&#34;btn btn-default btn-small notification-btn review-btn sr&#34;&gt;Review&lt;/button&gt; &lt;/div&gt; &lt;/div&gt; &lt;/div&gt; " data-graded="True"> <p class="loading-spinner"> <i class="fa fa-spinner fa-pulse fa-2x fa-fw"></i> <span class="sr">Loading&hellip;</span> </p> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@html_site_search_box3"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@html_site_search_box3" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Optimality_of_superdense_coding_and_teleportation" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Optimality of superdense coding and teleportation</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Optimality of superdense coding and teleportation</h3> <div id="video_U2L1j" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1j/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:DaS3MqVseDM&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1j"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box9"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box9" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>

<div class="xblock xblock-public_view xblock-public_view-vertical" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="vertical" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@vertical+block@Quantum_interaction-free_measurements_-_bomb_detection" data-init="VerticalStudentView" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <h2 class="hd hd-2 unit-title">Quantum interaction-free measurements - bomb detection</h2> <div class="vert-mod"> <div class="vert vert-0" data-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k"> <div class="xblock xblock-public_view xblock-public_view-video xmodule_display xmodule_VideoBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="video" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "Video"} </script> <h3 class="hd hd-2">Quantum interaction-free measurements - bomb detection</h3> <div id="video_U2L1k" class="video closed" data-metadata='{&#34;autoplay&#34;: false, &#34;speed&#34;: null, &#34;duration&#34;: 0.0, &#34;generalSpeed&#34;: 1.0, &#34;lmsRootURL&#34;: &#34;https://openlearninglibrary.mit.edu&#34;, &#34;ytTestTimeout&#34;: 1500, &#34;showCaptions&#34;: &#34;true&#34;, &#34;savedVideoPosition&#34;: 0.0, &#34;completionEnabled&#34;: false, &#34;ytMetadataEndpoint&#34;: &#34;&#34;, &#34;sources&#34;: [], &#34;autohideHtml5&#34;: false, &#34;autoAdvance&#34;: false, &#34;transcriptAvailableTranslationsUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k/handler/transcript/available_translations&#34;, &#34;end&#34;: 0.0, &#34;saveStateUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k/handler/xmodule_handler/save_user_state&#34;, &#34;saveStateEnabled&#34;: false, &#34;completionPercentage&#34;: 0.95, &#34;ytApiUrl&#34;: &#34;https://www.youtube.com/iframe_api&#34;, &#34;captionDataDir&#34;: null, &#34;transcriptLanguages&#34;: {&#34;en&#34;: &#34;English&#34;}, &#34;publishCompletionUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k/handler/publish_completion&#34;, &#34;recordedYoutubeIsAvailable&#34;: true, &#34;start&#34;: 0.0, &#34;transcriptLanguage&#34;: &#34;en&#34;, &#34;transcriptTranslationUrl&#34;: &#34;/courses/course-v1:MITx+8.370.2x+1T2018/xblock/block-v1:MITx+8.370.2x+1T2018+type@video+block@U2L1k/handler/transcript/translation/__lang__&#34;, &#34;prioritizeHls&#34;: false, &#34;streams&#34;: &#34;1.00:-hwWufcByJ4&#34;, &#34;poster&#34;: null}' data-bumper-metadata='null' data-autoadvance-enabled="False" data-poster='null' tabindex="-1" > <div class="focus_grabber first"></div> <div class="tc-wrapper"> <div class="video-wrapper"> <span tabindex="0" class="spinner" aria-hidden="false" aria-label="Loading video player"></span> <span tabindex="-1" class="btn-play fa fa-youtube-play fa-2x is-hidden" aria-hidden="true" aria-label="Play video"></span> <div class="video-player-pre"></div> <div class="video-player"> <div id="U2L1k"></div> <h4 class="hd hd-4 video-error is-hidden">No playable video sources found.</h4> <h4 class="hd hd-4 video-hls-error is-hidden"> Your browser does not support this video format. Try using a different browser. </h4> </div> <div class="video-player-post"></div> <div class="closed-captions"></div> <div class="video-controls is-hidden"> <div> <div class="vcr"><div class="vidtime">0:00 / 0:00</div></div> <div class="secondary-controls"></div> </div> </div> </div> </div> <div class="focus_grabber last"></div> </div> </div> </div> <div class="vert vert-1" data-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box10"> <div class="xblock xblock-public_view xblock-public_view-html xmodule_display xmodule_HtmlBlock" data-runtime-version="1" data-course-id="course-v1:MITx+8.370.2x+1T2018" data-graded="True" data-block-type="html" data-has-score="False" data-usage-id="block-v1:MITx+8.370.2x+1T2018+type@html+block@site_search_box10" data-init="XBlockToXModuleShim" data-runtime-class="LmsRuntime" data-request-token="b04450db383811f0ad1b0e09798aea1b"> <script type="json/xblock-args" class="xblock-json-init-args"> {"xmodule-type": "HTMLModule"} </script> <span><a href="/asset-v1:MITx+8.370.2x+1T2018+type@asset+block/NONE" id="dummy_course_static_link" style="display:none"/><a href="/courses/course-v1:MITx+8.370.2x+1T2018/jump_to_id/NONE" id="dummy_jump_link" style="display:none"/><script type="text/javascript"> var add_site_search = function(){ course_static_url = $('#dummy_course_static_link').attr('href').replace('/NONE', ''); jump_to_url = $('#dummy_jump_link').attr('href').replace('/NONE', ''); if (typeof String.prototype.startsWith != 'function') { // see below for better implementation! String.prototype.startsWith = function (str){ return this.indexOf(str) === 0; }; } if(typeof(String.prototype.trim) === "undefined") { String.prototype.trim = function() { return String(this).replace(/^\s+|\s+$/g, ''); }; } var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var amp = String.fromCharCode(38); var rlb = rb + lb; var mke = function(x){ return lb + x + rb; } var search_module_url = ""; var get_search_module_ficus = function(){ var cid = $('div.xblock').data('course-id'); if (cid){ console.log("cid = ", cid); // search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/" + cid + "/courseware/welcome/Search_this_course/"; search_module_url = "/courses/course-v1:MITx+8.370.2x+1T2018/courseware/welcome/Search_this_course/"; // automatically rewritten console.log("3. search_module_url = ", search_module_url); return; } var course_root_link = $('span.nav-item-course').find('a').attr('href'); if (course_root_link){ console.log("course_root_link = ", course_root_link); search_module_url = course_root_link.replace("course/", "courseware/welcome/Search_this_course/"); console.log("2. search_module_url = ", search_module_url); return } console.log("cannot determine search module url"); } var get_search_module = function(){ // find search this module link if (!($('div.course-index').length)){ return get_search_module_ficus(); } $('div.course-index').find('nav').find('a').each(function(){ if ($(this).text().trim().startsWith("Search this course")){ search_module_url = $(this).attr('href'); console.log("search_module_url = ", search_module_url); } }); } var go_to_search = function(){ get_search_module(); var sterm = $('#site-search-box').val(); // new_url = jump_to_url + "/Search_this_module/?q=" + sterm; new_url = search_module_url + "?q=" + sterm; console.log("sterm = ", sterm, " ; going to ", new_url); window.location.href = new_url; } if (!$('#site-search-box').length){ $("nav.courseware").find("ol").append(lb + "section style='float:right'" + rlb + "input size='20'" + " id='site-search-box'" + rlb + "img src='" + course_static_url + "/images_search_glass.png'/" + rlb + "/input" + rlb + "/section" + rb); } $("#site-search-box").keypress(function(event) { if (event.which == 13) { event.preventDefault(); go_to_search(); } }); // $('#site-search-box').bind("enterKey", go_to_search); var get = function(x){ return eval(x); } return {'course_static_url': course_static_url, 'jump_to_url': jump_to_url, 'go_to_search': go_to_search, 'get_search_module': get_search_module, 'get_search_module_ficus': get_search_module_ficus, 'get': get, } } var the_site_search = add_site_search(); var add_fix_transcript = function(){ if ($('div.wrap-instructor-info').length==0){ return; } $('div.xblock-student_view-video').each(function(key, vblock_e){ var vblock = $(vblock_e); var vuid = vblock.data('usage-id').split('@'); var vid; if (vuid.length==1){ vuid = vblock.data('usage-id').split(';_') vid = vuid[5]; }else{ vid = vuid[2]; } var mfnpre = vid.split("_video",1)[0]; var mfnid = mfnpre; // no periods mfnpre = mfnpre.replace('8_370', '8.370'); // periods in gh filename var lb = String.fromCharCode(60); var rb = String.fromCharCode(62); var mke = function(x){ return lb + x + rb; } var ftid = "fix_transcript_" + mfnid; if (!$('#' + ftid).length){ var html = lb + "span id='" + ftid + "' style='float:right'" + rb + lb + "a href='#'" + rb; html += "contribute transcript fix" + mke("/a") + mke("/span"); console.log("html = ", html); vblock.after(html) } $('#' + ftid).click(function(){ var cst = $('ol.subtitles').find('li.current'); var cindex = Number(cst.data('index')); var gurl; if (mfnpre.endsWith('_cq_sol')){ gurl = "https://github.com/mitocw/content-mit-8370x-cq-sol-subtitles/blob/master/"; }else{ gurl = "https://github.com/mitocw/content-mit-8370x-subtitles/blob/master/"; } gurl += mfnpre + ".txt#L" + String(cindex + 10 + 1); console.log("going to ", gurl); window.open(gurl, "MITx 8.370x subtitle source"); }); }); } try{ add_fix_transcript(); } catch(err){ console.log(err); } try{ var rb = String.fromCharCode(62); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 3000); setTimeout(function(){ $('.math' + rb + 'span').css("border-left-color","transparent"); }, 8000); } catch(err){ console.log(err); } </script></span> </div> </div> </div> </div>