Tunable spin-orbit-coupled Bose-Einstein condensates in deep optical lattices

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dc.contributor.authorSalerno, M.
dc.contributor.authorAbdullaev, F. Kh.
dc.contributor.authorGammal, A.
dc.contributor.authorTomio, Lauro [UNESP]
dc.contributor.institutionUniversitá di Salerno
dc.contributor.institutionUniversidade Federal do ABC (UFABC)
dc.contributor.institutionInternational Islamic University Malaysia
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionCTA
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:07:00Z
dc.date.available2018-12-11T17:07:00Z
dc.date.issued2016-10-03
dc.description.abstractBinary mixtures of Bose-Einstein condensates (BECs) trapped in deep optical lattices and subjected to equal contributions of Rashba and Dresselhaus spin-orbit coupling (SOC) are investigated in the presence of a periodic time modulation of the Zeeman field. SOC tunability is explicitly demonstrated by adopting a mean-field tight-binding model for the BEC mixture and by performing an averaging approach in the strong modulation limit. In this case, the system can be reduced to an unmodulated vector discrete nonlinear Schrödinger equation with a rescaled SOC tuning parameter α, which depends only on the ratio between amplitude and frequency of the applied Zeeman field. We consider the attractive interaction case and focus on the effect of the SOC tuning on the localized ground states. The dependence of the spectrum of the linear system on α has been analytically characterized. In particular, we show that extremal curves (ground and highest excited states) of the linear spectrum are continuous piecewise functions (together with their derivatives) of α, which consist of a finite number of decreasing band lobes joined by constant lines. This structure also remains in the presence of inter- and intra-species interactions, the nonlinearity mainly introducing a number of localized states in the band gaps. The stability of ground states in the presence of the modulating field has been demonstrated by real-time evolutions of the original (unaveraged) system. Localization properties of the ground state induced by the SOC tuning, and a parameter design for possible experimental observation, have also been discussed.en
dc.description.affiliationDipartimento di Fisica E.R. Caianiello CNISM Istituto Nazionale di Fisica Nucleare Gruppo Collegato di Salerno Universitá di Salerno, Via Giovanni Paolo II
dc.description.affiliationCentro de Ciências Naturais e Humanas Universidade Federal Do ABC
dc.description.affiliationDepartment of Physics Kulliyyah of Science International Islamic University Malaysia
dc.description.affiliationInstituto de Física Universidade de São Paulo
dc.description.affiliationInstituto Tecnológico de Aeroáutica CTA
dc.description.affiliationInstituto de Física Teórica Universidade Estadual Paulista (UNESP)
dc.description.affiliationUnespInstituto de Física Teórica Universidade Estadual Paulista (UNESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.identifierhttp://dx.doi.org/10.1103/PhysRevA.94.043602
dc.identifier.citationPhysical Review A, v. 94, n. 4, 2016.
dc.identifier.doi10.1103/PhysRevA.94.043602
dc.identifier.file2-s2.0-84991702422.pdf
dc.identifier.issn2469-9934
dc.identifier.issn2469-9926
dc.identifier.scopus2-s2.0-84991702422
dc.identifier.urihttp://hdl.handle.net/11449/173635
dc.language.isoeng
dc.relation.ispartofPhysical Review A
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.titleTunable spin-orbit-coupled Bose-Einstein condensates in deep optical latticesen
dc.typeArtigo

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