Nonlinear bulk viscosity and inflation

Details Nonlinear bulk viscosity and inflation Nonlinear bulk viscosity and inflation

1996-11-25

arxiv.org/abs/astro-ph/9611205v1

Phys.Rev. D55 (1997) 1937-1942

Astronomy and Astrophysics

Astrophysics

8 pages Revtex

Scientific paper

10.1103/PhysRevD.55.1937

We develop a nonlinear generalisation of the causal linear thermodynamics of
bulk viscosity, incorporating positivity of the entropy production rate and the
effective specific entropy. The theory is applied to viscous fluid inflation
(which is necessarily far from equilibrium), and we find thermodynamically
consistent inflationary solutions, both exponential and power-law.

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