Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1103/PhysRevE.86.012101 http://hdl.handle.net/11449/226917 |
Resumo: | We 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. © 2012 American Physical Society. |
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Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limitWe 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. © 2012 American Physical Society.Instituto de Física Teórica UNESP-São Paulo State University, Caixa Postal 70532-2, 01156-970 São Paulo, SPInstitut für Theoretische Physik TU Berlin, Hardenbergstr. 36, D-10623 BerlinInstituto de Física Teórica UNESP-São Paulo State University, Caixa Postal 70532-2, 01156-970 São Paulo, SPUniversidade Estadual Paulista (UNESP)TU BerlinAlcalde, M. Aparicio [UNESP]Bucher, M.Emary, C.Brandes, T.2022-04-29T04:22:53Z2022-04-29T04:22:53Z2012-07-18info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.1103/PhysRevE.86.012101Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, v. 86, n. 1, 2012.1539-37551550-2376http://hdl.handle.net/11449/22691710.1103/PhysRevE.86.0121012-s2.0-84864440375Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysical Review E - Statistical, Nonlinear, and Soft Matter Physicsinfo:eu-repo/semantics/openAccess2022-04-29T04:22:53Zoai:repositorio.unesp.br:11449/226917Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:17:43.071616Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
title |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
spellingShingle |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit Alcalde, M. Aparicio [UNESP] |
title_short |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
title_full |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
title_fullStr |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
title_full_unstemmed |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
title_sort |
Thermal phase transitions for Dicke-type models in the ultrastrong-coupling limit |
author |
Alcalde, M. Aparicio [UNESP] |
author_facet |
Alcalde, M. Aparicio [UNESP] Bucher, M. Emary, C. Brandes, T. |
author_role |
author |
author2 |
Bucher, M. Emary, C. Brandes, T. |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) TU Berlin |
dc.contributor.author.fl_str_mv |
Alcalde, M. Aparicio [UNESP] Bucher, M. Emary, C. Brandes, T. |
description |
We 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. © 2012 American Physical Society. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-07-18 2022-04-29T04:22:53Z 2022-04-29T04:22:53Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1103/PhysRevE.86.012101 Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, v. 86, n. 1, 2012. 1539-3755 1550-2376 http://hdl.handle.net/11449/226917 10.1103/PhysRevE.86.012101 2-s2.0-84864440375 |
url |
http://dx.doi.org/10.1103/PhysRevE.86.012101 http://hdl.handle.net/11449/226917 |
identifier_str_mv |
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, v. 86, n. 1, 2012. 1539-3755 1550-2376 10.1103/PhysRevE.86.012101 2-s2.0-84864440375 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128342087434240 |