{"id":3241,"date":"2019-04-08T12:23:00","date_gmt":"2019-04-08T03:23:00","guid":{"rendered":"http:\/\/163.180.4.222\/lab\/?p=3241"},"modified":"2019-04-08T12:23:00","modified_gmt":"2019-04-08T03:23:00","slug":"walk-the-line-quantum-technology","status":"publish","type":"post","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=3241","title":{"rendered":"Walk the line (QUANTUM TECHNOLOGY)"},"content":{"rendered":"<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<div class=\"pl20 mq875-pl0 serif\">\n<p>Qubits made from semiconductor quantum dots are a potential platform for future quantum computing. Although quantum gates with high fidelity have been demonstrated, the coupling of such qubits over distances, for example for use in quantum registers, remains a challenge. Mills et al. now show how they can controllably shuttle single electrons through a linear array of quantum dots.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"pl20 mq875-pl0 serif\">\n<p>The researchers define nine Si quantum dots in a Si\/SiGe heterostructure by an advanced gate structure. They use three charge sensors to map out the nine-dimensional charge stability space. The adjustment of the chemical potentials of the dots and the connecting tunnelling barrier enables the controlled transfer of a single electron between neighbouring dots.<\/p>\n<p>&nbsp;<\/p>\n<p>Furthermore, the transition from a control scheme based on physical gate voltages to a virtual gate scheme strongly diminishes the effect of crosstalk between quantum dots and allows the researchers to control several electrons within the array independently.<\/p>\n<p>&nbsp;<\/p>\n<\/div>\n<div class=\"pl20 mq875-pl0 serif\">\n<p>Mills et al. then design a control sequence that shuttles a single electron through the array in either direction within about 50 ns. With more complex sequences, two or three electrons can move through the array at a time, well separated by at least one empty dot at all times.<\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>(\uc6d0\ubb38: <a href=\"https:\/\/www.nature.com\/articles\/s41565-019-0432-z?utm_source=feedburner&amp;utm_medium=feed&amp;utm_campaign=Feed%3A+nnano%2Frss%2Fcurrent+%28Nature+Nanotechnology+-+Issue%29\">\uc5ec\uae30<\/a>\ub97c \ud074\ub9ad\ud558\uc138\uc694~)<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; &nbsp; Qubits made from semiconductor quantum dots are a potential platform for future quantum computing. Although quantum gates with high fidelity have been demonstrated,<a href=\"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=3241\" class=\"more-link\">(more&#8230;)<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[34,35,36,29,30],"tags":[],"class_list":["post-3241","post","type-post","status-publish","format-standard","hentry","category-lets-do-chemistry","category-lets-do-computer-science","category-lets-do-physics","category-lets-do-science","category-recent-science-news"],"aioseo_notices":[],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack-related-posts":[{"id":3255,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=3255","url_meta":{"origin":3241,"position":0},"title":"All for one and one for all (QUANTUM OPTICS)","author":"biochemistry","date":"April 8, 2019","format":false,"excerpt":"\u00a0 \u00a0 Quantum information (QI) has become a focus of research during the past two decades, with the goal of exploiting the potentialities offered by superposition and entanglement of quantum states (1). The first hardware implementations of QI relied on quantum systems hosting clean, well-isolated two-level systems such as atoms\u2026","rel":"","context":"In &quot;Essays on Science&quot;","block_context":{"text":"Essays on Science","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=32"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4159,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=4159","url_meta":{"origin":3241,"position":1},"title":"Google claims quantum computing milestone","author":"biochemistry","date":"September 27, 2019","format":false,"excerpt":"\u00a0 \u00a0 The age of quantum computing may have begun not with a flashy press conference, but with an internet leak. According to a paper posted briefly\u2014and presumably mistakenly\u2014to a lab website, physicists at Google have used a quantum computer to perform a calculation that would overwhelm the world's best\u2026","rel":"","context":"In &quot;Essays on Science&quot;","block_context":{"text":"Essays on Science","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=32"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":2956,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=2956","url_meta":{"origin":3241,"position":2},"title":"The next step in making arrays of single atoms","author":"biochemistry","date":"March 27, 2019","format":false,"excerpt":"\u00a0 \u00a0 Three studies have demonstrated the cooling and trapping of single strontium and ytterbium atoms in two-dimensional arrays. Such arrays could lead to advances in atomic-clock technology and in quantum simulation and computing. \u00a0 \u00a0 The world around us is made of atoms. There are enormous numbers of them,\u2026","rel":"","context":"In &quot;Let's Do Chemistry!&quot;","block_context":{"text":"Let's Do Chemistry!","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=34"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":4545,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=4545","url_meta":{"origin":3241,"position":3},"title":"Quantum computing takes flight &#038; A precarious milestone for quantum computing &#038; Hello quantum world! Google publishes landmark quantum supremacy claim","author":"biochemistry","date":"October 23, 2019","format":false,"excerpt":"\u00a0 \u00a0 \ub17c\ub780\uc758 \uad6c\uae00 \uc591\uc790\ucef4\ud4e8\ud130 \uce69 \ub4dc\ub514\uc5b4 \uacf5\uac1c...\"\uc591\uc790\uc6b0\uc6d4\uc131 \ub2ec\uc131\ud588\ub2e4\" \u00a0 \u00a0 \uad6c\uae00 '\ub124\uc774\ucc98' \ub17c\ubb38 \ubc1c\ud45c...\ub09c\uc218 \uc99d\uba85 \ud2b9\uc815 \uacfc\uc81c\uc5d0\uc11c \uc288\ud37c\ucef4 \ub2a5\uac00 \ud655\uc778 \u00a0 \uad6c\uae00\uc774 \uc591\uc790\ucef4\ud4e8\ud130\ub85c \uae30\uc874 \ucef4\ud4e8\ud130\ub97c \ub2a5\uac00\ud558\ub294 \uc5f0\uc0b0 \uc131\ub2a5\uc744 \ubcf4\uc774\ub294 \uc774\ub978\ubc14 '\uc591\uc790\uc6b0\uc6d4\uc131'\uc744 \ub2ec\uc131\ud588\ub2e4\ub294 \ub17c\ubb38\uc744 \uc815\uc2dd \ubc1c\ud45c\ud588\ub2e4. 9\uc6d4 \uc911\uc21c\ubd80\ud130 \ud55c \ub2ec \uc774\uc0c1 \uc9c0\uc18d\ub3fc \uc628 \ub17c\ub780\uc774 \uc77c\ub2e8 \uac00\ub77c\uc549\uc744 \uac83\uc73c\ub85c \ubcf4\uc778\ub2e4. \uad6c\uae00\u00a0AI\u00a0\ube14\ub85c\uadf8 \uc81c\uacf5\u2026","rel":"","context":"In &quot;'06. \uc5d0\ub108\uc9c0\uc640 \uc5d4\ud2b8\ub85c\ud53c'\uc640 '07. \uacfc\ud559\uacfc \ubb38\uba85' \uad00\ub828&quot;","block_context":{"text":"'06. \uc5d0\ub108\uc9c0\uc640 \uc5d4\ud2b8\ub85c\ud53c'\uc640 '07. \uacfc\ud559\uacfc \ubb38\uba85' \uad00\ub828","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=42"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1821,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=1821","url_meta":{"origin":3241,"position":4},"title":"Reimagining of Schr\u00f6dinger\u2019s cat breaks quantum mechanics \u2014 and stumps physicists","author":"biochemistry","date":"September 23, 2018","format":false,"excerpt":"\u00a0 \u00a0 (\uc6d0\ubb38: \uc5ec\uae30\ub97c \ud074\ub9ad\ud558\uc138\uc694~) \u00a0 \u00a0 In a multi-\u2018cat\u2019 experiment, the textbook interpretation of quantum theory seems to lead to contradictory pictures of reality, physicists claim. \u00a0 \u00a0 Credit: Aleksei Isachenko\/Alamy \u00a0 \u00a0 In the world\u2019s most famous thought experiment, physicist Erwin Schr\u00f6dinger described how a cat in a\u2026","rel":"","context":"In &quot;Let's Do Chemistry!&quot;","block_context":{"text":"Let's Do Chemistry!","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=34"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":1525,"url":"https:\/\/biochemistry.khu.ac.kr\/lab\/?p=1525","url_meta":{"origin":3241,"position":5},"title":"\ucc45 \uc18c\uac1c &#8211; Understanding the double slit","author":"biochemistry","date":"September 2, 2018","format":false,"excerpt":"\u00a0 \u00a0 (\uc6d0\ubb38: \uc5ec\uae30\ub97c \ud074\ub9ad\ud558\uc138\uc694~) \u00a0 \u00a0 Science\u00a0\u00a031 Aug 2018: Vol. 361, Issue 6405, pp. 855 DOI: 10.1126\/science.aav0128 \u00a0 \u00a0 In his famous\u00a0Lectures on Physics, Richard Feynman argued that nothing more is needed to get a solid grasp of the behavior of quantum objects than the simple double-slit experiment, in\u2026","rel":"","context":"In &quot;Essays on Science&quot;","block_context":{"text":"Essays on Science","link":"https:\/\/biochemistry.khu.ac.kr\/lab\/?cat=32"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"jetpack_sharing_enabled":false,"jetpack_shortlink":"https:\/\/wp.me\/p9Xo1j-Qh","_links":{"self":[{"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/posts\/3241","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3241"}],"version-history":[{"count":1,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/posts\/3241\/revisions"}],"predecessor-version":[{"id":3242,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=\/wp\/v2\/posts\/3241\/revisions\/3242"}],"wp:attachment":[{"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3241"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3241"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/biochemistry.khu.ac.kr\/lab\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3241"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}