Viscous Accelerating Universe with Non-linear and Logarithmic Equation of State Fluid
General Relativity and Quantum Cosmology
2019-08-05 v1
Abstract
We describe the accelerated expansion of the late-time universe using a generalized equation of state (EoS) when account is taken of bulk viscosity. We assume a homogeneous and isotropic Friedmann-Robertson-Walker spacetime. Solutions of the gravitational equations for dark energy are obtained in implicit form. Characteristic properties of the Universe evolution in the presence of the viscosity effects are discussed. Finally, the dynamics of the accelerated expansion of the viscous universe is discussed, on the basis of a modified logarithmic-corrected EoS.
Keywords
Cite
@article{arxiv.1907.02280,
title = {Viscous Accelerating Universe with Non-linear and Logarithmic Equation of State Fluid},
author = {I. Brevik and A. N. Makarenko and A. V. Timoshkin},
journal= {arXiv preprint arXiv:1907.02280},
year = {2019}
}
Comments
12 pages, no figures; to appear in Int. J. of Geometric Methods in Modern Physics