{"id":1071,"date":"2012-11-10T22:52:04","date_gmt":"2012-11-11T03:52:04","guid":{"rendered":"http:\/\/quantum.gmu.edu\/?p=1071"},"modified":"2012-11-10T23:15:08","modified_gmt":"2012-11-11T04:15:08","slug":"a-topological-ladder","status":"publish","type":"post","link":"https:\/\/quantum.physics.gmu.edu\/?p=1071","title":{"rendered":"A topological ladder"},"content":{"rendered":"<p style=\"text-align: center;\"><a href=\"http:\/\/quantum.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-1079\" title=\"ladder.001\" src=\"http:\/\/quantum.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/quantum.physics.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012-300x225.jpg 300w, https:\/\/quantum.physics.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012-250x187.jpg 250w, https:\/\/quantum.physics.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012-533x400.jpg 533w, https:\/\/quantum.physics.gmu.edu\/wp-content\/uploads\/2012\/11\/ladder.0012.jpg 1024w\" sizes=\"auto, (max-width: 300px) 85vw, 300px\" \/><\/a><\/p>\n<p>The orbital degrees of freedom refer to different shapes of the wave functions with degenerate energies. In recent years, optical lattices engineered by interfering laser beams offer new means to explore interacting fermions with orbital degrees of freedom the symmetries of which differ from those found in traditional solids. We show that\u00a0the orbital hopping pattern alone is sufficient for producing topologically non-trivial band structures.\u00a0We unveil a topological insulator phase of fermions on a two-leg ladder of \u00a0double-well lattices, similar to those recently realized in experiments.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>Topological orbital ladders,\u00a0Xiaopeng Li, Erhai Zhao, W. Vincent Liu,\u00a0arXiv:1205.0254<\/p>\n<p><a href=\"http:\/\/arxiv.org\/abs\/1205.0254\">http:\/\/arxiv.org\/abs\/1205.0254<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The orbital degrees of freedom refer to different shapes of the wave functions with degenerate energies. In recent years, optical lattices engineered by interfering laser beams offer new means to explore interacting fermions with orbital degrees of freedom the symmetries of which differ from those found in traditional solids. We show that\u00a0the orbital hopping pattern &hellip; <a href=\"https:\/\/quantum.physics.gmu.edu\/?p=1071\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;A topological ladder&#8221;<\/span><\/a><\/p>\n","protected":false},"author":9,"featured_media":1072,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21,22,24,17],"tags":[],"class_list":["post-1071","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-atomic-molecular-optical-physics","category-condensed-matter-physics","category-erhai-zhao","category-slider"],"_links":{"self":[{"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/posts\/1071","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1071"}],"version-history":[{"count":8,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/posts\/1071\/revisions"}],"predecessor-version":[{"id":1074,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/posts\/1071\/revisions\/1074"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=\/wp\/v2\/media\/1072"}],"wp:attachment":[{"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1071"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1071"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/quantum.physics.gmu.edu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1071"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}