CASIMIR EFFECT AT NONZERO TEMPERATURES IN A CLOSED FRIEDMANN UNIVERSE

Authors
ZHUK A KLEINERT H
Citation
A. Zhuk et H. Kleinert, CASIMIR EFFECT AT NONZERO TEMPERATURES IN A CLOSED FRIEDMANN UNIVERSE, Theoretical and mathematical physics, 109(2), 1996, pp. 1483-1493
Citations number
27
Categorie Soggetti
Mathematical Method, Physical Science",Physics,"Physycs, Mathematical
Journal title
Theoretical and mathematical physics → ACNP
ISSN journal
00405779
Volume
109
Issue
2
Year of publication
1996
Pages
1483 - 1493
Database
ISI
SICI code
0040-5779(1996)109:2<1483:CEANTI>2.0.ZU;2-Y
Abstract
For massive and massless scalar fields with an arbitrary coupling to g ravity, we investigate finite-size (Casimir) effects on the free energ y at nonzero temperatures in a slowly evolving closed Friedmann univer se. The renormalized expressions for the fi ee energy and the resultin g energy density and pressure are found and their physical properties are discussed. The equation of state turns out to have the form P = rh o/3 for radiation with arbitrary coupling.