{"id":411,"date":"2011-07-25T09:59:44","date_gmt":"2011-07-25T09:59:44","guid":{"rendered":"http:\/\/blogs.kent.ac.uk\/strongcorrelations\/?p=411"},"modified":"2011-09-19T09:22:39","modified_gmt":"2011-09-19T09:22:39","slug":"thermal-versus-quantum-fluctuations-of-optical-lattice-fermions","status":"publish","type":"post","link":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/","title":{"rendered":"Thermal versus Quantum Fluctuations of Optical Lattice Fermions"},"content":{"rendered":"<ul class=\"kent-social-links\"><li><a href='http:\/\/www.facebook.com\/sharer.php?u=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;t=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-facebook' title='Share via Facebook'><\/i><\/a><\/li><li><a href='http:\/\/twitter.com\/home?status=Thermal versus Quantum Fluctuations of Optical Lattice Fermions%20https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/' target='_blank'><i class='ksocial-twitter' title='Share via Twitter'><\/i><\/a><\/li><li><a href='https:\/\/plus.google.com\/share?url=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/' target='_blank'><i class='ksocial-google-plus' title='Share via Google Plus'><\/i><\/a><\/li><li><a href='http:\/\/linkedin.com\/shareArticle?mini=true&amp;url=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;title=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-linkedin' title='Share via Linked In'><\/i><\/a><\/li><li><a href='mailto:content=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;title=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-email' title='Share via Email'><\/i><\/a><\/li><\/ul><figure id=\"attachment_413\" aria-describedby=\"caption-attachment-413\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"http:\/\/blogs.kent.ac.uk\/strongcorrelations\/files\/2011\/07\/Screenshot.png\" target=\"_blank\"><img loading=\"lazy\" class=\"size-medium wp-image-413\" src=\"http:\/\/blogs.kent.ac.uk\/strongcorrelations\/files\/2011\/07\/Screenshot-300x155.png\" alt=\"Sketch of double occupancy in a an optical lattice\" width=\"300\" height=\"155\" srcset=\"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/files\/2011\/07\/Screenshot-300x155.png 300w, https:\/\/blogs.kent.ac.uk\/strongcorrelations\/files\/2011\/07\/Screenshot.png 920w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-413\" class=\"wp-caption-text\">Schematic of trap filling in three different regimes for fermions in an optical lattice with decreasing on-site repulsion from left to right. a) Mott insulator with single occupancy, b) Doubly occupied sites at the trap center flanked by edges with low filling, and c) A band insulator dominated by doubly occupied sites. These sketches ignore both quantum and thermal fluctuations.<\/figcaption><\/figure>\n<p class=\"size-medium wp-image-413\">V. L. Campo, K. Capelle, C. Hooley, J. Quintanilla, V. W. Scarola<\/p>\n<p>We show that, for fermionic atoms in a one-dimensional optical lattice, the fraction of atoms in doubly occupied sites is a highly non-monotonic function of temperature. We demonstrate that this property persists even in the presence of realistic harmonic confinement, and that it leads to a suppression of entropy at intermediate temperatures that offers a clear route to adiabatic cooling. Our interpretation of the suppression is that such intermediate temperatures are simultaneously too high for quantum coherence and too low for significant thermal excitation of double occupancy thus offering a clear indicator of the onset of quantum fluctuations.<\/p>\n<p><a href=\"http:\/\/arxiv.org\/abs\/1107.4349\">http:\/\/arxiv.org\/abs\/1107.4349<\/a><\/p>\n<ul class=\"kent-social-links\"><li><a href='http:\/\/www.facebook.com\/sharer.php?u=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;t=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-facebook' title='Share via Facebook'><\/i><\/a><\/li><li><a href='http:\/\/twitter.com\/home?status=Thermal versus Quantum Fluctuations of Optical Lattice Fermions%20https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/' target='_blank'><i class='ksocial-twitter' title='Share via Twitter'><\/i><\/a><\/li><li><a href='https:\/\/plus.google.com\/share?url=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/' target='_blank'><i class='ksocial-google-plus' title='Share via Google Plus'><\/i><\/a><\/li><li><a href='http:\/\/linkedin.com\/shareArticle?mini=true&amp;url=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;title=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-linkedin' title='Share via Linked In'><\/i><\/a><\/li><li><a href='mailto:content=https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/&amp;title=Thermal versus Quantum Fluctuations of Optical Lattice Fermions' target='_blank'><i class='ksocial-email' title='Share via Email'><\/i><\/a><\/li><\/ul>","protected":false},"excerpt":{"rendered":"<p>V. L. Campo, K. Capelle, C. Hooley, J. Quintanilla, V. W. Scarola We show that, for fermionic atoms in a one-dimensional optical lattice, the fraction &hellip; <a href=\"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/2011\/07\/25\/thermal-versus-quantum-fluctuations-of-optical-lattice-fermions\/\">Read&nbsp;more<\/a><\/p>\n","protected":false},"author":976,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[597],"tags":[],"_links":{"self":[{"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/posts\/411"}],"collection":[{"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/users\/976"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/comments?post=411"}],"version-history":[{"count":7,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/posts\/411\/revisions"}],"predecessor-version":[{"id":454,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/posts\/411\/revisions\/454"}],"wp:attachment":[{"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/media?parent=411"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/categories?post=411"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.kent.ac.uk\/strongcorrelations\/wp-json\/wp\/v2\/tags?post=411"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}