Entropy production in an expanding universe

Details Entropy production in an expanding universe Entropy production in an expanding universe

Dec 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985phlb..165...59m&link_type=abstract

Physics Letters B, Volume 165, Issue 1-3, p. 59-62.

Physics

33

Scientific paper

We consider an interacting scalar field in a time-dependent background and estimate dissipative effects due to particle production and/or interactions of the field with a heat bath using techniques of thermo field dynamics. Assuming the system is in near-thermal equilibrium, a general expression for the source of friction is presented. Applying the result to an expanding universe, the effective equation of motion for the classical background is obtained and implications are discussed.

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