Phase transitions of the coherently coupled two-component Bose gas in a square optical lattice

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dc.citation.issue6
dc.citation.rankM21
dc.citation.spage063623
dc.citation.volume96
dc.contributor.authorBornheimer, Ulrike
dc.contributor.authorVasić, Ivana
dc.contributor.authorHofstetter, Walter
dc.date.accessioned2024-07-05T12:23:07Z
dc.date.available2024-07-05T12:23:07Z
dc.date.issued2017-12-28
dc.description.abstractWe investigate properties of an ultracold, two-component bosonic gas in a square optical lattice at unit filling. In addition to density-density interactions, the atoms are subject to coherent light-matter interactions that couple different internal states. We examine the influence of this coherent coupling on the system and its quantum phases by using Gutzwiller mean-field theory as well as bosonic dynamical mean-field theory. We find that the interplay of strong interspecies repulsion and coherent coupling affects the Mott insulator to superfluid transition and shifts the tip of the Mott lobe toward higher values of the tunneling amplitude. In the strongly interacting Mott regime, the resulting Bose-Hubbard model can be mapped onto an effective spin Hamiltonian that offers additional insights into the observed phenomena.
dc.identifier.doi10.1103/physreva.96.063623
dc.identifier.issn2469-9926
dc.identifier.issn2469-9934
dc.identifier.scopus2-s2.0-85039847309
dc.identifier.urihttps://pub.ipb.ac.rs/handle/123456789/180
dc.identifier.wos000418794800005
dc.language.isoen
dc.publisherAmerican Physical Society
dc.relation.ispartofPhysical Review A
dc.relation.ispartofabbrPhys. Rev. A
dc.rightsrestrictedAccess
dc.titlePhase transitions of the coherently coupled two-component Bose gas in a square optical lattice
dc.typeArticle
dc.type.versionpublishedVersion
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