Casimir effect at nonzero temperatures in a closed Friedmann Universe

Details Casimir effect at nonzero temperatures in a closed Friedmann Universe Casimir effect at nonzero temperatures in a closed Friedmann Universe

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996tmp...109.1483z&link_type=abstract

Theoretical and Mathematical Physics, Volume 109, Issue 2, pp.1483-1493

Mathematics

Mathematical Physics

3

Scientific paper

For massive and massless scalar fields with an arbitrary coupling to gravity, we investigate finite-size (Casimir) effects on the free energy at nonzero temperatures in a slowly evolving closed Friedmann universe. The renormalized expressions for the free energy and the resulting energy density and pressure are found and their physical properties are discussed. The equation of state turns out to have the form P=ρ/3 for radiation with arbitrary coupling.

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