Disorder-induced localization in a strongly correlated atomic Hubbard gas

Physical Review Letters
S S KondovB DeMarco

Abstract

We observe the emergence of a disorder-induced insulating state in a strongly interacting atomic Fermi gas trapped in an optical lattice. This closed quantum system, free of a thermal reservoir, realizes the disordered Fermi-Hubbard model, which is a minimal model for strongly correlated electronic solids. We observe disorder-induced localization of a metallic state through measurements of mass transport. By varying the lattice potential depth, we detect interaction-driven delocalization of the disordered insulating state. We also measure localization that persists as the temperature of the gas is raised. These behaviors are consistent with many-body localization, which is a novel paradigm for understanding localization in interacting quantum systems at nonzero temperature.

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Citations

Dec 27, 2015·Physical Review Letters·Thereza PaivaRichard T Scalettar
Apr 23, 2016·Physical Review Letters·Pranjal BordiaUlrich Schneider
Jul 21, 2016·Proceedings of the National Academy of Sciences of the United States of America·Vincent P MichalGeorgy V Shlyapnikov
Mar 16, 2018·Physical Review Letters·Ken Xuan WeiPaola Cappellaro
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Jan 18, 2018·Physical Review Letters·Sarang GopalakrishnanMichael Knap
Jun 8, 2019·Physical Review Letters·M MierzejewskiJ Bonča
Aug 1, 2019·Scientific Reports·Luis A González-GarcíaRosario Paredes
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Dec 24, 2016·Physical Review Letters·N Y YaoJ E Moore
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Sep 28, 2017·Physical Review Letters·Vedika KhemaniDavid A Huse
Jan 13, 2019·Physical Review Letters·Linxiao NiuXiaoji Zhou
Apr 10, 2019·Nature Communications·W XuB DeMarco
Apr 26, 2019·Proceedings of the National Academy of Sciences of the United States of America·Evert van NieuwenburgGil Refael
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Feb 27, 2018·Physical Review Letters·Kai XuHeng Fan
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Apr 20, 2019·Science·Alexander LukinMarkus Greiner

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