Neutron matter instabilities induced by strong magnetic fields

Autores
Aguirre, Ricardo; Bauer, Eduardo
Año de publicación
2013
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We study some properties of spin-polarized neutron matter in the presence of a strong magnetic field at finite temperature. Using the Skyrme model together with the Hartree-Fock approximation we obtain an energy density functional that is employed to extract the spin polarization, the effective mass and the magnetic free energy of the system. In order to find the equilibrium state, we have analyzed different global spin configurations over a wide range of matter density (00≦3), magnetic field intensity (1014 G≦B<1019 G) and temperature (T≦80MeV). The outcome is that the system can be either completely spin-down polarized or partially polarized. A change in any of the (n, T, B)-variables can induce a transition from one polarization state to the other. The transition takes place in a surface in the (n, T, B)-phase space, which represents an instability of the system. We have also found a discontinuity in the internal energy associated with this change in the state of magnetization.
Facultad de Ciencias Exactas
Materia
Física
Magnetic instability
Neutron matter
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:10915/85474

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network_name_str SEDICI (UNLP)
spelling Neutron matter instabilities induced by strong magnetic fieldsAguirre, RicardoBauer, EduardoFísicaMagnetic instabilityNeutron matterWe study some properties of spin-polarized neutron matter in the presence of a strong magnetic field at finite temperature. Using the Skyrme model together with the Hartree-Fock approximation we obtain an energy density functional that is employed to extract the spin polarization, the effective mass and the magnetic free energy of the system. In order to find the equilibrium state, we have analyzed different global spin configurations over a wide range of matter density (0<n/n<sub>0</sub>≦3), magnetic field intensity (10<sup>14</sup> G≦B<10<sup>19</sup> G) and temperature (T≦80MeV). The outcome is that the system can be either completely spin-down polarized or partially polarized. A change in any of the (n, T, B)-variables can induce a transition from one polarization state to the other. The transition takes place in a surface in the (n, T, B)-phase space, which represents an instability of the system. We have also found a discontinuity in the internal energy associated with this change in the state of magnetization.Facultad de Ciencias Exactas2013info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf136-140http://sedici.unlp.edu.ar/handle/10915/85474enginfo:eu-repo/semantics/altIdentifier/issn/0370-2693info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2013.02.046info: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:UNLP2025-09-29T11:16:30Zoai:sedici.unlp.edu.ar:10915/85474Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:16:31.061SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Neutron matter instabilities induced by strong magnetic fields
title Neutron matter instabilities induced by strong magnetic fields
spellingShingle Neutron matter instabilities induced by strong magnetic fields
Aguirre, Ricardo
Física
Magnetic instability
Neutron matter
title_short Neutron matter instabilities induced by strong magnetic fields
title_full Neutron matter instabilities induced by strong magnetic fields
title_fullStr Neutron matter instabilities induced by strong magnetic fields
title_full_unstemmed Neutron matter instabilities induced by strong magnetic fields
title_sort Neutron matter instabilities induced by strong magnetic fields
dc.creator.none.fl_str_mv Aguirre, Ricardo
Bauer, Eduardo
author Aguirre, Ricardo
author_facet Aguirre, Ricardo
Bauer, Eduardo
author_role author
author2 Bauer, Eduardo
author2_role author
dc.subject.none.fl_str_mv Física
Magnetic instability
Neutron matter
topic Física
Magnetic instability
Neutron matter
dc.description.none.fl_txt_mv We study some properties of spin-polarized neutron matter in the presence of a strong magnetic field at finite temperature. Using the Skyrme model together with the Hartree-Fock approximation we obtain an energy density functional that is employed to extract the spin polarization, the effective mass and the magnetic free energy of the system. In order to find the equilibrium state, we have analyzed different global spin configurations over a wide range of matter density (0<n/n<sub>0</sub>≦3), magnetic field intensity (10<sup>14</sup> G≦B<10<sup>19</sup> G) and temperature (T≦80MeV). The outcome is that the system can be either completely spin-down polarized or partially polarized. A change in any of the (n, T, B)-variables can induce a transition from one polarization state to the other. The transition takes place in a surface in the (n, T, B)-phase space, which represents an instability of the system. We have also found a discontinuity in the internal energy associated with this change in the state of magnetization.
Facultad de Ciencias Exactas
description We study some properties of spin-polarized neutron matter in the presence of a strong magnetic field at finite temperature. Using the Skyrme model together with the Hartree-Fock approximation we obtain an energy density functional that is employed to extract the spin polarization, the effective mass and the magnetic free energy of the system. In order to find the equilibrium state, we have analyzed different global spin configurations over a wide range of matter density (0<n/n<sub>0</sub>≦3), magnetic field intensity (10<sup>14</sup> G≦B<10<sup>19</sup> G) and temperature (T≦80MeV). The outcome is that the system can be either completely spin-down polarized or partially polarized. A change in any of the (n, T, B)-variables can induce a transition from one polarization state to the other. The transition takes place in a surface in the (n, T, B)-phase space, which represents an instability of the system. We have also found a discontinuity in the internal energy associated with this change in the state of magnetization.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/85474
url http://sedici.unlp.edu.ar/handle/10915/85474
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0370-2693
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.physletb.2013.02.046
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
136-140
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instname:Universidad Nacional de La Plata
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repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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