A FRW dark fluid with a non-linear inhomogeneous equation of state
A dark Friedman–Robertson–Walker fluid governed by a non-linear inhomogeneous equation of state is considered that can be viewed as a conveniently simple paradigm for a whole class of models that exhibit phase transitions from a non-phantom towards a phantom era (superacceleration transition). On the other hand, such dark fluid models may also describe quintessence-like cosmic acceleration. Thermodynamical considerations for the processes involved, which are of great importance in the characterization of the global evolution of the corresponding universe, are given too. Connecting the proposed equation of state with an anisotropic Kasner universe with viscosity, we are led to the plausible conjecture of a dark fluid origin of the anisotropies in the early universe.
KeywordsDark Energy Hubble Parameter Bulk Viscosity Dark Fluid Simple Paradigm
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- 3.L. Perivolaropoulos, astro-ph/0601014Google Scholar
- 4.I.Y. Arefeva, I. Volovich, hep-th/0612098Google Scholar
- 9.O. Gorbunova, hep-th/0608043Google Scholar
- 12.J. Ren, X.H. Meng, astro-ph/0605010Google Scholar
- 15.A. Balaguera-Antonez, M. Nowakowski, 0704.1871[gr-qc]Google Scholar
- 21.S. Nojiri, S.D. Odintsov, hep-th/0702031Google Scholar
- 27.S. Nojiri, S.D. Odintsov, hep-th/0611071Google Scholar