Thermodynamics of nonsingular bouncing universes
General Relativity and Quantum Cosmology
2016-03-09 v4 Cosmology and Nongalactic Astrophysics
Abstract
Homogeneous and isotropic, nonsingular, bouncing world models are designed to evade the initial singularity at the beginning of the cosmic expansion. Here, we study the thermodynamics of the subset of these models governed by general relativity. Considering the entropy of matter, radiation and that the entropy of the apparent horizon is proportional to its area, we argue that these models do not respect the generalised second law of thermodynamics, also away from the bounce.
Keywords
Cite
@article{arxiv.1509.03725,
title = {Thermodynamics of nonsingular bouncing universes},
author = {Pedro C. Ferreira and Diego Pavon},
journal= {arXiv preprint arXiv:1509.03725},
year = {2016}
}
Comments
12 pages, 3 figures. Version published in the European Physical Journal C