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dc.contributor.authorLima, Diefferson Rubeni da Rosa dept_BR
dc.contributor.authorLinks, Jonpt_BR
dc.contributor.authorIsaac, Phillip S.pt_BR
dc.contributor.authorFoerster, Angelapt_BR
dc.date.accessioned2017-10-20T02:26:59Zpt_BR
dc.date.issued2017pt_BR
dc.identifier.issn1050-2947pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/169617pt_BR
dc.description.abstractThe extended Bose-Hubbard model for a double-well potential with atom-pair tunneling is studied. Starting with a classical analysis we determine the existence of three quantum phases: self-trapping, phase-locking, and Josephson states. From this analysis we build the parameter space of quantum phase transitions between degenerate and nondegenerate ground states driven by the atom-pair tunneling. Considering only the repulsive case, we confirm the phase transition by the measure of the energy gap between the ground state and the first excited state. We study the structure of the solutions of the Bethe ansatz equations for a small number of atoms. An inspection of the roots for the ground state suggests a relationship to the physical properties of the system. By studying the energy gap we find that the profile of the roots of the Bethe ansatz equations is related to a quantum phase transition.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofPhysical review. A, Atomic, molecular, and optical physics. New York. Vol. 95, no. 4 (Apr. 2017), 043607, 9 p.pt_BR
dc.rightsOpen Accessen
dc.subjectTransformações de fasept_BR
dc.subjectTunelamentopt_BR
dc.subjectEquacao de bethe ansatzpt_BR
dc.subjectModelo de hubbardpt_BR
dc.titleTwo-site Bose-Hubbard model with nonlinear tunneling : classical and quantum analysispt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb001044431pt_BR
dc.type.originEstrangeiropt_BR


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