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Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit

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dc.contributor.authorAparicio Alcalde, M. [UNESP]
dc.contributor.authorBucher, M.
dc.contributor.authorEmary, C.
dc.contributor.authorBrandes, T.
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionTU Berlin
dc.date.accessioned2013-09-30T19:02:14Z
dc.date.accessioned2014-05-20T14:13:43Z
dc.date.available2013-09-30T19:02:14Z
dc.date.available2014-05-20T14:13:43Z
dc.date.issued2012-07-18
dc.description.abstractWe consider the Dicke model in the ultrastrong-coupling limit to investigate thermal phase transitions and their precursors at finite particle numbers N for bosonic and fermionic systems. We derive partition functions with degeneracy factors that account for the number of configurations and derive explicit expressions for the Landau free energy. This allows us to discuss the difference between the original Dicke (fermionic) and the bosonic case. We find a crossover between these two cases that shows up, for example, in the specific heat.en
dc.description.affiliationUNESP São Paulo State Univ, Inst Fis Teor, BR-01156970 São Paulo, Brazil
dc.description.affiliationTU Berlin, Inst Theoret Phys, D-10623 Berlin, Germany
dc.description.affiliationUnespUNESP São Paulo State Univ, Inst Fis Teor, BR-01156970 São Paulo, Brazil
dc.description.sponsorshipDeutsche Forschungsgemeinschaft (DFG)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdDFG: SFB 910
dc.format.extent4
dc.identifierhttp://dx.doi.org/10.1103/PhysRevE.86.012101
dc.identifier.citationPhysical Review E. College Pk: Amer Physical Soc, v. 86, n. 1, p. 4, 2012.
dc.identifier.doi10.1103/PhysRevE.86.012101
dc.identifier.fileWOS000306509700007.pdf
dc.identifier.issn1539-3755
dc.identifier.urihttp://hdl.handle.net/11449/24651
dc.identifier.wosWOS:000306509700007
dc.language.isoeng
dc.publisherAmer Physical Soc
dc.relation.ispartofPhysical Review E
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.titleThermal phase transitions for Dicke-type models in the ultrastrong-coupling limiten
dc.typeArtigo
dcterms.licensehttp://publish.aps.org/authors/transfer-of-copyright-agreement
dcterms.rightsHolderAmer Physical Soc
dspace.entity.typePublication
unesp.campusUniversidade Estadual Paulista (UNESP), Instituto de Física Teórica (IFT), São Paulopt

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São Paulo - IFT - Instituto de Física Teórica