Irreversible dynamics of quasispin systems

It is shown that nuclear matter described by quasispin or pseudospin operators may exhibit irreversible behavior, in the sense of modern kinetic theory. With the help of the group-contraction technique, a harmonic oscillator can be associated to the many-body system and it is seen that in the standa...

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Autores principales: Hernández, Ester Susana, Solari, Hernán Gustavo
Publicado: 1982
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v25_n4_p2087_Hernandez
http://hdl.handle.net/20.500.12110/paper_05562813_v25_n4_p2087_Hernandez
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_05562813_v25_n4_p2087_Hernandez
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spelling paper:paper_05562813_v25_n4_p2087_Hernandez2023-06-08T15:41:27Z Irreversible dynamics of quasispin systems Hernández, Ester Susana Solari, Hernán Gustavo It is shown that nuclear matter described by quasispin or pseudospin operators may exhibit irreversible behavior, in the sense of modern kinetic theory. With the help of the group-contraction technique, a harmonic oscillator can be associated to the many-body system and it is seen that in the standard Lipkin-Meshkov-Glick model the ground-state phase transition gives rise to a significant change in the spectral properties of the characteristic operators. This fact makes room for the introduction of the microscopic operators of irreversible dynamics. Their meaning and the consequences of their existence are examined and it is seen that the time evolution of the quasispin arrangement closely resembles the approach to equilibrium of a macroscopic system. NUCLEAR STRUCTURE Operators of irreversible Hamiltonian dynamics; quasispin nuclear matter; group contraction, Lipkin-Meshkov-Glick model; ground-state phase transition; entropy; irreversible approach to equilibrium. © 1982 The American Physical Society. Fil:Hernandez, E.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Solari, H.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1982 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v25_n4_p2087_Hernandez http://hdl.handle.net/20.500.12110/paper_05562813_v25_n4_p2087_Hernandez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description It is shown that nuclear matter described by quasispin or pseudospin operators may exhibit irreversible behavior, in the sense of modern kinetic theory. With the help of the group-contraction technique, a harmonic oscillator can be associated to the many-body system and it is seen that in the standard Lipkin-Meshkov-Glick model the ground-state phase transition gives rise to a significant change in the spectral properties of the characteristic operators. This fact makes room for the introduction of the microscopic operators of irreversible dynamics. Their meaning and the consequences of their existence are examined and it is seen that the time evolution of the quasispin arrangement closely resembles the approach to equilibrium of a macroscopic system. NUCLEAR STRUCTURE Operators of irreversible Hamiltonian dynamics; quasispin nuclear matter; group contraction, Lipkin-Meshkov-Glick model; ground-state phase transition; entropy; irreversible approach to equilibrium. © 1982 The American Physical Society.
author Hernández, Ester Susana
Solari, Hernán Gustavo
spellingShingle Hernández, Ester Susana
Solari, Hernán Gustavo
Irreversible dynamics of quasispin systems
author_facet Hernández, Ester Susana
Solari, Hernán Gustavo
author_sort Hernández, Ester Susana
title Irreversible dynamics of quasispin systems
title_short Irreversible dynamics of quasispin systems
title_full Irreversible dynamics of quasispin systems
title_fullStr Irreversible dynamics of quasispin systems
title_full_unstemmed Irreversible dynamics of quasispin systems
title_sort irreversible dynamics of quasispin systems
publishDate 1982
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_05562813_v25_n4_p2087_Hernandez
http://hdl.handle.net/20.500.12110/paper_05562813_v25_n4_p2087_Hernandez
work_keys_str_mv AT hernandezestersusana irreversibledynamicsofquasispinsystems
AT solarihernangustavo irreversibledynamicsofquasispinsystems
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