Effects of Bulk Viscosity on Cosmological Evolution

Details Effects of Bulk Viscosity on Cosmological Evolution Effects of Bulk Viscosity on Cosmological Evolution

1994-11-29

arxiv.org/abs/gr-qc/9411071v1

NuovoCim.B109:1317-1322,1994

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, latex, no figures

Scientific paper

10.1007/BF02722842

The effect of bulk viscisity on the evolution of the homogeneous and isotropic cosmological models is considered. Solutions are found, with a barotropic equation of state, and a viscosity coefficient that is proportional to a power of the energy density of the universe. For flat space, power law expansions, related to extended inflation are found as well as exponential solutions, related to old inflation; also a solution with expansion that is an exponential of an exponential of the time is found.

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