Natural entropy production in an inflationary model for a polarized vacuum |
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| Authors: | Marcelo Samuel Berman Murari M Som |
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| Institution: | (1) Instituto Albert Einstein, Av. Candido Hartmann, 575 #17, 80730-440 Curitiba, PR, Brazil;(2) Instituto de Física da UFRJ, Ilha do Fundao, 21945-000 Rio de Janeiro, RJ, Brazil |
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| Abstract: | 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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| Keywords: | Cosmology Einstein Very early Universe Entropy Polarized vacuum |
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