Cosmological solutions with nonlinear bulk viscosity

A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk...

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Autores principales: Chimento, L.P., Jakubi, A.S., Méndez, V., Maartens, R.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02649381_v14_n12_p3363_Chimento
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_02649381_v14_n12_p3363_Chimento
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spelling todo:paper_02649381_v14_n12_p3363_Chimento2023-10-03T15:13:08Z Cosmological solutions with nonlinear bulk viscosity Chimento, L.P. Jakubi, A.S. Méndez, V. Maartens, R. A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk viscosity index q < 1 and the latter for q > 1. New solutions are obtained in the weakly nonlinear regime for q = 1. These solutions are singular and some of them represent a late-time inflationary era. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02649381_v14_n12_p3363_Chimento
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description A recently proposed nonlinear transport equation is used to model bulk viscous cosmologies that may be far from equilibrium, as happens during viscous fluid inflation or during reheating. The asymptotic stability of the de Sitter and Friedmann solutions is investigated. The former is stable for bulk viscosity index q < 1 and the latter for q > 1. New solutions are obtained in the weakly nonlinear regime for q = 1. These solutions are singular and some of them represent a late-time inflationary era.
format JOUR
author Chimento, L.P.
Jakubi, A.S.
Méndez, V.
Maartens, R.
spellingShingle Chimento, L.P.
Jakubi, A.S.
Méndez, V.
Maartens, R.
Cosmological solutions with nonlinear bulk viscosity
author_facet Chimento, L.P.
Jakubi, A.S.
Méndez, V.
Maartens, R.
author_sort Chimento, L.P.
title Cosmological solutions with nonlinear bulk viscosity
title_short Cosmological solutions with nonlinear bulk viscosity
title_full Cosmological solutions with nonlinear bulk viscosity
title_fullStr Cosmological solutions with nonlinear bulk viscosity
title_full_unstemmed Cosmological solutions with nonlinear bulk viscosity
title_sort cosmological solutions with nonlinear bulk viscosity
url http://hdl.handle.net/20.500.12110/paper_02649381_v14_n12_p3363_Chimento
work_keys_str_mv AT chimentolp cosmologicalsolutionswithnonlinearbulkviscosity
AT jakubias cosmologicalsolutionswithnonlinearbulkviscosity
AT mendezv cosmologicalsolutionswithnonlinearbulkviscosity
AT maartensr cosmologicalsolutionswithnonlinearbulkviscosity
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