{"id":1149,"date":"2019-08-08T11:27:45","date_gmt":"2019-08-08T09:27:45","guid":{"rendered":"https:\/\/wp.icmm.csic.es\/npqsic\/?p=1149"},"modified":"2019-08-12T00:16:18","modified_gmt":"2019-08-11T22:16:18","slug":"characterization-of-qubit-dephasing-by-landau-zener-stuckelberg-majorana-interferometry","status":"publish","type":"post","link":"https:\/\/wp.icmm.csic.es\/npqsic\/characterization-of-qubit-dephasing-by-landau-zener-stuckelberg-majorana-interferometry\/","title":{"rendered":"Characterization of Qubit Dephasing by Landau-Zener-St\u00fcckelberg-Majorana Interferometry"},"content":{"rendered":"<p><span style=\"font-family: 'Open Sans Light'\">F. Forster, G. Petersen, S. Manus, P. H\u00e4nggi, D. Schuh, W. Wegscheider, <\/span><a href=\"https:\/\/wp.icmm.csic.es\/npqsic\/our-people\/sigmund-kohler\/\">S. Kohler<\/a><span style=\"font-family: 'Open Sans Light'\">, and S. Ludwig<\/span><\/p>\n<p><a href=\"http:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.112.116803\" target=\"blank\" rel=\"noopener noreferrer\">Phys. Rev. Lett 112, 116803 (2014)<\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/wp.icmm.csic.es\/tgqtn\/wp-content\/uploads\/sites\/20\/2009\/02\/Sigmund_lett_2014.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-664\" src=\"https:\/\/wp.icmm.csic.es\/tgqtn\/wp-content\/uploads\/sites\/20\/2009\/02\/Sigmund_lett_2014.png\" alt=\"Sigmund_lett_2014\" width=\"570\" height=\"195\"><\/a>Controlling coherent interaction at avoided crossings and the dynamics there is at the heart of quantum information processing. A particularly intriguing dynamics is observed in the Landau-Zener regime, where periodic passages through the avoided crossing result in an interference pattern carrying information about qubit properties. In this Letter, we demonstrate a straightforward method, based on steady-state experiments, to obtain all relevant information about a qubit, including complex environmental influences. We use a two-electron charge qubit defined in a lateral double quantum dot as test system and demonstrate a long coherence time of T2\u2243200\u2009\u2009ns, which is limited by electron-phonon interaction.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>F. Forster, G. Petersen, S. Manus, P. H\u00e4nggi, D. Schuh, W. Wegscheider, S. Kohler, and S. Ludwig Phys. Rev. Lett 112, 116803 (2014) &nbsp; Controlling coherent interaction at avoided crossings and the dynamics there is at the heart of quantum information processing. A particularly intriguing dynamics is observed in the&#8230;<\/p>\n<p class=\"continue-reading-button\"> <a class=\"continue-reading-link\" href=\"https:\/\/wp.icmm.csic.es\/npqsic\/characterization-of-qubit-dephasing-by-landau-zener-stuckelberg-majorana-interferometry\/\">Continue reading<i class=\"crycon-right-dir\"><\/i><\/a><\/p>\n","protected":false},"author":1,"featured_media":1275,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[7,9,8],"tags":[],"class_list":["post-1149","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-7","category-kohler","category-publications"],"_links":{"self":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1149","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/comments?post=1149"}],"version-history":[{"count":3,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1149\/revisions"}],"predecessor-version":[{"id":1314,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/posts\/1149\/revisions\/1314"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/media\/1275"}],"wp:attachment":[{"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/media?parent=1149"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/categories?post=1149"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wp.icmm.csic.es\/npqsic\/wp-json\/wp\/v2\/tags?post=1149"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}