Nonlinear bulk viscosity and inflation
arXiv:astro-ph/9611205 · doi:10.1103/PhysRevD.55.1937
Abstract
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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