1212.0391 (I. Brevik et al.)

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

I. Brevik, V. V. Obukhov, A. V. Timoshkin

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.

View original: http://arxiv.org/abs/1212.0391