Compressibility of a Fermionic Mott Insulator of Ultracold Atoms

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dc.citation.firstpage70403en_US
dc.citation.issueNumber7en_US
dc.citation.journalTitlePhysical Review Lettersen_US
dc.citation.volumeNumber114en_US
dc.contributor.authorDuarte, Pedro M.en_US
dc.contributor.authorHart, Russell A.en_US
dc.contributor.authorYang, Tsung-Linen_US
dc.contributor.authorLiu, Xinxingen_US
dc.contributor.authorPaiva, Therezaen_US
dc.contributor.authorKhatami, Ehsanen_US
dc.contributor.authorScalettar, Richard T.en_US
dc.contributor.authorTrivedi, Nandinien_US
dc.contributor.authorHulet, Randall G.en_US
dc.contributor.orgRice Quantum Instituteen_US
dc.date.accessioned2015-03-30T19:07:13Z
dc.date.available2015-03-30T19:07:13Z
dc.date.issued2015en_US
dc.description.abstractWe characterize the Mott insulating regime of a repulsively interacting Fermi gas of ultracold atoms in a three-dimensional optical lattice. We use inﾠsitu imaging to extract the central density of the gas and to determine its local compressibility. For intermediate to strong interactions, we observe the emergence of a plateau in the density as a function of atom number, and a reduction of the compressibility at a density of one atom per site, indicating the formation of a Mott insulator. Comparisons to state-of-the-art numerical simulations of the Hubbard model over a wide range of interactions reveal that the temperature of the gas is of the order of, or below, the tunneling energy scale. Our results hold great promise for the exploration of many-body phenomena with ultracold atoms, where the local compressibility can be a useful tool to detect signatures of different phases or phase boundaries at specific values of the filling.en_US
dc.identifier.citationDuarte, Pedro M., Hart, Russell A., Yang, Tsung-Lin, et al.. "Compressibility of a Fermionic Mott Insulator of Ultracold Atoms." <i>Physical Review Letters,</i> 114, no. 7 (2015) American Physical Society: 70403. http://dx.doi.org/10.1103/PhysRevLett.114.070403.
dc.identifier.doihttp://dx.doi.org/10.1103/PhysRevLett.114.070403en_US
dc.identifier.urihttps://hdl.handle.net/1911/79453
dc.language.isoengen_US
dc.publisherAmerican Physical Society
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.titleCompressibility of a Fermionic Mott Insulator of Ultracold Atomsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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