Dark Energy and Viscous Cosmology
General Relativity and Quantum Cosmology
2009-11-11 v2
Abstract
Singularities in the dark energy universe are discussed, assuming that there is a bulk viscosity in the cosmic fluid. In particular, it is shown how the physically natural assumption of letting the bulk viscosity be proportional to the scalar expansion in a spatially flat FRW universe can drive the fluid into the phantom region (w < -1), even if lies in the quintessence region (w > -1) in the non-viscous case.
Keywords
Cite
@article{arxiv.gr-qc/0504001,
title = {Dark Energy and Viscous Cosmology},
author = {I. Brevik and O. Gorbunova},
journal= {arXiv preprint arXiv:gr-qc/0504001},
year = {2009}
}
Comments
11 pages. Printing error in eq.(23) corrected. To appear in Gen. Rel. Grav