Neutron matter under strong magnetic fields: A comparison of models

Autores
Aguirre, Ricardo Miguel; Bauer, Eduardo; Vidaña, Isaac
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the behavior of the isothermal compressibility and the magnetic susceptibility. Our calculation is performed using both microscopic and phenomenological approaches of the neutron matter equation of state, namely the Brueckner-Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force, the effective Skyrme model in a Hartree-Fock description, and the quantum hadrodynamic formulation with a mean-field approximation. All these approaches predict a change from completely spin polarized to partially polarized matter that leads to a continuous equation of state. The compressibility and the magnetic susceptibility show characteristic behaviors which reflect that fact. Thermal effects tend to smear out the sharpness found for these quantities at T = 0. In most cases a thermal increase of ΔT = 10 MeV is enough to hide the signals of the change of polarization. The set of densities and magnetic field intensities for which the system changes it spin polarization is different for each model. However, we found that under the conditions examined in this work there is an overall agreement between the three theoretical descriptions.
Facultad de Ciencias Exactas
Instituto de Física La Plata
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/126109
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/126109
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Neutron matter under strong magnetic fields: A comparison of modelsAguirre, Ricardo MiguelBauer, EduardoVidaña, IsaacCiencias ExactasFísicaAstronomíamagnetic fieldPhysicsneutron matterequilibrium configurationdensitiestemperaturesisothermal compressibilitymagnetic susceptibilityThe equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the behavior of the isothermal compressibility and the magnetic susceptibility. Our calculation is performed using both microscopic and phenomenological approaches of the neutron matter equation of state, namely the Brueckner-Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force, the effective Skyrme model in a Hartree-Fock description, and the quantum hadrodynamic formulation with a mean-field approximation. All these approaches predict a change from completely spin polarized to partially polarized matter that leads to a continuous equation of state. The compressibility and the magnetic susceptibility show characteristic behaviors which reflect that fact. Thermal effects tend to smear out the sharpness found for these quantities at T = 0. In most cases a thermal increase of ΔT = 10 MeV is enough to hide the signals of the change of polarization. The set of densities and magnetic field intensities for which the system changes it spin polarization is different for each model. However, we found that under the conditions examined in this work there is an overall agreement between the three theoretical descriptions.Facultad de Ciencias ExactasInstituto de Física La PlataFacultad de Ciencias Astronómicas y Geofísicas2014-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/126109enginfo:eu-repo/semantics/altIdentifier/issn/0556-2813info:eu-repo/semantics/altIdentifier/issn/1089-490Xinfo:eu-repo/semantics/altIdentifier/arxiv/1312.3280info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevc.89.035809info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:11:10Zoai:sedici.unlp.edu.ar:10915/126109Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:11:11.208SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Neutron matter under strong magnetic fields: A comparison of models
title Neutron matter under strong magnetic fields: A comparison of models
spellingShingle Neutron matter under strong magnetic fields: A comparison of models
Aguirre, Ricardo Miguel
Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
title_short Neutron matter under strong magnetic fields: A comparison of models
title_full Neutron matter under strong magnetic fields: A comparison of models
title_fullStr Neutron matter under strong magnetic fields: A comparison of models
title_full_unstemmed Neutron matter under strong magnetic fields: A comparison of models
title_sort Neutron matter under strong magnetic fields: A comparison of models
dc.creator.none.fl_str_mv Aguirre, Ricardo Miguel
Bauer, Eduardo
Vidaña, Isaac
author Aguirre, Ricardo Miguel
author_facet Aguirre, Ricardo Miguel
Bauer, Eduardo
Vidaña, Isaac
author_role author
author2 Bauer, Eduardo
Vidaña, Isaac
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
topic Ciencias Exactas
Física
Astronomía
magnetic field
Physics
neutron matter
equilibrium configuration
densities
temperatures
isothermal compressibility
magnetic susceptibility
dc.description.none.fl_txt_mv The equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the behavior of the isothermal compressibility and the magnetic susceptibility. Our calculation is performed using both microscopic and phenomenological approaches of the neutron matter equation of state, namely the Brueckner-Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force, the effective Skyrme model in a Hartree-Fock description, and the quantum hadrodynamic formulation with a mean-field approximation. All these approaches predict a change from completely spin polarized to partially polarized matter that leads to a continuous equation of state. The compressibility and the magnetic susceptibility show characteristic behaviors which reflect that fact. Thermal effects tend to smear out the sharpness found for these quantities at T = 0. In most cases a thermal increase of ΔT = 10 MeV is enough to hide the signals of the change of polarization. The set of densities and magnetic field intensities for which the system changes it spin polarization is different for each model. However, we found that under the conditions examined in this work there is an overall agreement between the three theoretical descriptions.
Facultad de Ciencias Exactas
Instituto de Física La Plata
Facultad de Ciencias Astronómicas y Geofísicas
description The equation of state of neutron matter is affected by the presence of a magnetic field due to the intrinsic magnetic moment of the neutron. Here we study the equilibrium configuration of this system for a wide range of densities, temperatures, and magnetic fields. Special attention is paid to the behavior of the isothermal compressibility and the magnetic susceptibility. Our calculation is performed using both microscopic and phenomenological approaches of the neutron matter equation of state, namely the Brueckner-Hartree-Fock (BHF) approach using the Argonne V18 nucleon-nucleon potential supplemented with the Urbana IX three-nucleon force, the effective Skyrme model in a Hartree-Fock description, and the quantum hadrodynamic formulation with a mean-field approximation. All these approaches predict a change from completely spin polarized to partially polarized matter that leads to a continuous equation of state. The compressibility and the magnetic susceptibility show characteristic behaviors which reflect that fact. Thermal effects tend to smear out the sharpness found for these quantities at T = 0. In most cases a thermal increase of ΔT = 10 MeV is enough to hide the signals of the change of polarization. The set of densities and magnetic field intensities for which the system changes it spin polarization is different for each model. However, we found that under the conditions examined in this work there is an overall agreement between the three theoretical descriptions.
publishDate 2014
dc.date.none.fl_str_mv 2014-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/126109
url http://sedici.unlp.edu.ar/handle/10915/126109
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0556-2813
info:eu-repo/semantics/altIdentifier/issn/1089-490X
info:eu-repo/semantics/altIdentifier/arxiv/1312.3280
info:eu-repo/semantics/altIdentifier/doi/10.1103/physrevc.89.035809
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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