Viscosity in modified gravity
General Relativity and Quantum Cosmology
2012-11-26 v2
Abstract
A bulk viscosity is introduced in the formalism of modified gravity. It is shown that, on the basis of a natural scaling law for the viscosity, a simple solution can be found for quantities such as the Hubble parameter and the energy density. These solutions may incorporate a viscosity-induced Big Rip singularity. By introducing a phase transition in the cosmic fluid, the future singularity can nevertheless in principle be avoided.
Keywords
Cite
@article{arxiv.1211.2562,
title = {Viscosity in modified gravity},
author = {Iver Brevik},
journal= {arXiv preprint arXiv:1211.2562},
year = {2012}
}
Comments
9 pages, no figure; reference list updated and expanded