Cosmological solutions with nonlinear bulk viscosity

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

doi:10.1088/0264-9381/14/12/019

Cosmological solutions with nonlinear bulk viscosity

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

Institute of Cosmology & Gravitation

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

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
Issue number	12
DOIs	https://doi.org/10.1088/0264-9381/14/12/019
Publication status	Published - Dec 1997

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title = "Cosmological solutions with nonlinear bulk viscosity",

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. ",

author = "Chimento, {Luis P.} and Jakubi, {Alejandro S.} and Vicen{\c c} M{\'e}ndez and Roy Maartens",

year = "1997",

month = dec,

doi = "10.1088/0264-9381/14/12/019",

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AU - Chimento, Luis P.

AU - Jakubi, Alejandro S.

AU - Méndez, Vicenç

AU - Maartens, Roy

PY - 1997/12

Y1 - 1997/12

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.

U2 - 10.1088/0264-9381/14/12/019

DO - 10.1088/0264-9381/14/12/019

M3 - Article

SN - 0264-9381

VL - 14

SP - 3363

EP - 3375

JO - Classical and Quantum Gravity

JF - Classical and Quantum Gravity

IS - 12

ER -

Cosmological solutions with nonlinear bulk viscosity

Abstract

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