Cosmological solutions with nonlinear bulk viscosity

Luis P. Chimento; Alejandro S. Jakubi; Vicenç Méndez; Roy Maartens

doi:https://doi.org/10.1088/0264-9381/14/12/019

Cosmological solutions with nonlinear bulk viscosity

Luis P. Chimento, Alejandro S. Jakubi, Vicenç Méndez, Roy Maartens

Research output: Contribution to journal › Article › Research › peer-review

75 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	3363-3375
Journal	Classical and Quantum Gravity
Volume	14
DOIs	https://doi.org/10.1088/0264-9381/14/12/019
Publication status	Published - 1 Dec 1997

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Chimento, L. P., Jakubi, A. S., Méndez, V., & Maartens, R. (1997). Cosmological solutions with nonlinear bulk viscosity. Classical and Quantum Gravity, 14, 3363-3375. https://doi.org/10.1088/0264-9381/14/12/019

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AU - Maartens, Roy

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N2 - 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.

AB - 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.

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DO - https://doi.org/10.1088/0264-9381/14/12/019

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