dc.creator | García Ramos, José Enrique | es |
dc.creator | Dukelsky, Jorge | es |
dc.creator | Pérez Fernández, Pedro | es |
dc.creator | Arias Carrasco, José Miguel | es |
dc.date.accessioned | 2019-04-12T14:58:17Z | |
dc.date.available | 2019-04-12T14:58:17Z | |
dc.date.issued | 2019 | |
dc.identifier.citation | García Ramos, J.E., Dukelsky, J., Pérez Fernández, P. y Arias Carrasco, J.M. (2019). An extended Agassi model: Algebraic structure, phase diagram, and large size limit. Physica Scripta, 94 (4), 044003-. | |
dc.identifier.issn | 0031-8949 | es |
dc.identifier.uri | https://hdl.handle.net/11441/85599 | |
dc.description.abstract | The Agassi model (Agassi 1968 Nucl. Phys. A 116 49) is a schematic two-level model that involves pairing and monopole-monopole interactions. It is, therefore, an extension of the well known Lipkin-Meshkov-Glick model (Lipkin et al 1965 Nucl. Phys. 62 188). In this paper we review the algebraic formulation of an extension of the Agassi model as well as its bosonic realization through the Schwinger representation. Moreover, a mean-field approximation for the model is presented and its phase diagram discussed. Finally, a 1/j analysis, with j proportional to the degeneracy of each level, is worked out to obtain the thermodynamic limit of the ground state energy and some order parameters from the exact Hamiltonian diagonalization for finite - j. | es |
dc.description.sponsorship | Ministerio de Economía y Competitividad FIS2017-88410- 88410-P, FIS2014-53448-C2-2-P, FIS2015-63770-P | es |
dc.description.sponsorship | Junta de Andalucía FQM-160, FQM- 370 | es |
dc.format | application/pdf | es |
dc.language.iso | eng | es |
dc.publisher | Institute of Physics Publishing | es |
dc.relation.ispartof | Physica Scripta, 94 (4), 044003-. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.title | An extended Agassi model: Algebraic structure, phase diagram, and large size limit | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/acceptedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Aplicada III | es |
dc.relation.projectID | FIS2017-88410- 88410-P | es |
dc.relation.projectID | FIS2014-53448-C2-2-P | es |
dc.relation.projectID | FIS2015-63770-P | es |
dc.relation.projectID | FQM-160 | es |
dc.relation.projectID | FQM- 370 | es |
dc.relation.publisherversion | http://dx.doi.org/10.1088/1402-4896/aafc6d | es |
dc.identifier.doi | 10.1088/1402-4896/aafc6d | es |
idus.format.extent | 9 p. | es |
dc.journaltitle | Physica Scripta | es |
dc.publication.volumen | 94 | es |
dc.publication.issue | 4 | es |
dc.publication.initialPage | 044003 | es |