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arXiv · 1212.0391

Quasi-Rip and Pseudo-Rip Universes Induced by the Fluid Inhomogeneous Equation of State

I. Brevik·V. V. Obukhov·A. V. Timoshkin
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Abstract

We investigate specific models for a dark energy universe leading to Quasi-Rip and Pseudo-Rip cosmologies. In the Quasi-Rip model the equation of state parameter w is less than -1 in the first stage, but becomes larger than -1 in the second stage. In the Pseudo-Rip model the Hubble parameter tends to a constant value in the remote future, although w is always less than -1. Conditions for the appearance of the Quasi-Rip and the Pseudo-Rip in terms of the parameters in the equation of state are determined. Analogies with the theory of viscous cosmology are discussed.

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I. Brevik, V. V. Obukhov, A. V. Timoshkin. 2012-12-03. Quasi-Rip and Pseudo-Rip Universes Induced by the Fluid Inhomogeneous Equation of State. https://doi.org/10.1007/s10509-012-1328-7

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