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Quantum phase transitions of atom-molecule Bose mixtures in a double-well potential

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dc.contributor.authorRelaño Pérez, Armando
dc.contributor.authorDukelsky, J.
dc.contributor.authorPérez Fernández, P.
dc.contributor.authorArias, J. M.
dc.date.accessioned2023-06-19T13:29:13Z
dc.date.available2023-06-19T13:29:13Z
dc.date.issued2014-10-27
dc.description©2014 American Physical Society. This work is has been partially supported by the Spanish MINECO Grants No. FIS2012-35316, No. FIS2012-34479, and No. FIS2011-28738-c02-01, by Junta de Andalucía under group number FQM-160 and Project P11-FQM-7632, and by the Consolider-Ingenio 2010 Programme CPAN (CSD2007-00042).
dc.description.abstractThe ground state and spectral properties of Bose gases in double-well potentials are studied in two different scenarios: (i) an interacting atomic Bose gas, and (ii) a mixture of an atomic gas interacting with diatomic molecules. A ground state second-order quantum phase transition is observed in both scenarios. For large attractive values of the atom-atom interaction, the ground state is degenerate. For repulsive and small attractive interaction, the ground state is not degenerate and is well approximated by a boson coherent state. Both systems depict an excited state quantum phase transition. In both cases, a critical energy separates a region in which all the energy levels are degenerate in pairs, from another region in which there are no degeneracies. For the atomic system, the critical point displays a singularity in the density of states, whereas this behavior is largely smoothed for the mixed atom-molecule system.
dc.description.departmentDepto. de Estructura de la Materia, Física Térmica y Electrónica
dc.description.facultyFac. de Ciencias Físicas
dc.description.refereedTRUE
dc.description.sponsorshipMinisterio de Economía y Competitividad (MINECO), España
dc.description.sponsorshipJunta de Andalucía
dc.description.sponsorshipConsolider-Ingenio 2010 Programme CPAN
dc.description.statuspub
dc.eprint.idhttps://eprints.ucm.es/id/eprint/29017
dc.identifier.doi10.1103/PhysRevE.90.042139
dc.identifier.issn1539-3755
dc.identifier.officialurlhttp://journals.aps.org/pre/abstract/10.1103/PhysRevE.90.042139
dc.identifier.relatedurlhttp://journals.aps.org/
dc.identifier.urihttps://hdl.handle.net/20.500.14352/33842
dc.issue.number4
dc.journal.titlePhysical review E
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.projectIDFIS2012-35316
dc.relation.projectIDFIS2012-34479
dc.relation.projectIDFIS2011-28738-c02-01
dc.relation.projectIDFQM-160
dc.relation.projectIDP11-FQM-7632
dc.relation.projectIDCSD2007-00042
dc.rights.accessRightsopen access
dc.subject.cdu536
dc.subject.keywordDouble-well potential
dc.subject.keywordQuantum phase transitions
dc.subject.ucmTermodinámica
dc.subject.unesco2213 Termodinámica
dc.titleQuantum phase transitions of atom-molecule Bose mixtures in a double-well potential
dc.typejournal article
dc.volume.number90
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