Natural Entropy Production in an Inflationary Model for a Polarized Vacuum

Details Natural Entropy Production in an Inflationary Model for a Polarized Vacuum Natural Entropy Production in an Inflationary Model for a Polarized Vacuum

2007-01-06

arxiv.org/abs/physics/0701070v2

Astrophys.SpaceSci.310:277-279,2007

Physics

General Physics

7 pages including front one. Accepted to publication, Astrophysics and Space Science, subjected to a minor correction, already

Scientific paper

10.1007/s10509-007-9514-8

Though entropy production is forbidden in standard FRW Cosmology, Berman and Som presented a simple inflationary model where entropy production by bulk viscosity, during standard inflation without ad hoc pressure terms can be accommodated with Robertson-Walker's metric, so the requirement that the early Universe be anisotropic is not essential in order to have entropy growth during inflationary phase, as we show. Entropy also grows due to shear viscosity, for the anisotropic case. The intrinsically inflationary metric that we propose can be thought of as defining a polarized vacuum, and leads directly to the desired effects without the need of introducing extra pressure terms.

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