Onset of classical behaviour after a phase transition

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We analyze the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter of the model, interacts with an environment of its own short-wavelength modes. We compute the decoherence time for the system-field modes...

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Autores principales: Rivers, R.J., Lombardo, F.C.
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2005
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01039733_v35_n2B_p397_Rivers
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paperaa:paper_01039733_v35_n2B_p397_Rivers2023-06-12T16:46:30Z Onset of classical behaviour after a phase transition Braz. J. Phys. 2005;35(2 B):397-402 Rivers, R.J. Lombardo, F.C. We analyze the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter of the model, interacts with an environment of its own short-wavelength modes. We compute the decoherence time for the system-field modes from the master equation and compare it with the other time scales of the model. Within our approximations the decoherence time is in general the smallest dynamical time scale. Demanding diagonalisation of the decoherence functional produces identical results. The inclusion of other environmental fields makes diagonalisation occur even earlier. Fil:Lombardo, F.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01039733_v35_n2B_p397_Rivers
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language Inglés
orig_language_str_mv eng
description We analyze the onset of classical behaviour in a scalar field after a continuous phase transition, in which the system-field, the long wavelength order parameter of the model, interacts with an environment of its own short-wavelength modes. We compute the decoherence time for the system-field modes from the master equation and compare it with the other time scales of the model. Within our approximations the decoherence time is in general the smallest dynamical time scale. Demanding diagonalisation of the decoherence functional produces identical results. The inclusion of other environmental fields makes diagonalisation occur even earlier.
format Artículo
Artículo
publishedVersion
author Rivers, R.J.
Lombardo, F.C.
spellingShingle Rivers, R.J.
Lombardo, F.C.
Onset of classical behaviour after a phase transition
author_facet Rivers, R.J.
Lombardo, F.C.
author_sort Rivers, R.J.
title Onset of classical behaviour after a phase transition
title_short Onset of classical behaviour after a phase transition
title_full Onset of classical behaviour after a phase transition
title_fullStr Onset of classical behaviour after a phase transition
title_full_unstemmed Onset of classical behaviour after a phase transition
title_sort onset of classical behaviour after a phase transition
publishDate 2005
url http://hdl.handle.net/20.500.12110/paper_01039733_v35_n2B_p397_Rivers
work_keys_str_mv AT riversrj onsetofclassicalbehaviourafteraphasetransition
AT lombardofc onsetofclassicalbehaviourafteraphasetransition
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