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- W2003039213 abstract "As recently found by Youm, the entropy of the universe will no longer be expressible in the conventional Cardy-Verlinde form if one relaxes the radiation dominance state equation and instead assumes a more general equation of the form $p=(ensuremath{gamma}ensuremath{-}1)ensuremath{rho},$ with $ensuremath{gamma}$ a constant. We show that Youm's generalized entropy formula remains valid when the cosmic fluid is no longer ideal, but is allowed to possess a constant bulk viscosity $ensuremath{zeta}.$ We supply our analysis with some numerical estimates, thus calculating the scale factor $a(t)$ for a $k=0$ universe, and also calculate via a perturbative expansion in $ensuremath{zeta}$ the magnitude of the viscosity-induced correction to the scale factor if the universe is radiation dominated." @default.
- W2003039213 created "2016-06-24" @default.
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- W2003039213 date "2002-06-06" @default.
- W2003039213 modified "2023-09-23" @default.
- W2003039213 title "Cardy-Verlinde entropy formula in the presence of a general cosmological state equation" @default.
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- W2003039213 doi "https://doi.org/10.1103/physrevd.65.127302" @default.
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