Anisotropic multiple bounce models
Abstract
We analyze the Galileon ghost condensate implementation of a bouncing cosmological model in the presence of a non negligible anisotropic stress. We exhibit its structure, which we find to be far richer than previously thought. In particular, even restricting attention to a single set of underlying microscopic parameters, we obtain, numerically, many qualitatively different regimes: depending on the initial conditions on the scalar field leading the dynamics of the universe, the contraction phase can evolve directly towards a singularity, avoid it by bouncing once, or even bounce many times before settling into an ever-expanding phase. We clarify the behavior of the anisotropies in these various situations.
Cite
@article{arxiv.1705.04602,
title = {Anisotropic multiple bounce models},
author = {Anna Paula Bacalhau and Patrick Peter and Sandro D. P. Vitenti},
journal= {arXiv preprint arXiv:1705.04602},
year = {2017}
}
Comments
11 pages, 9 figures, minor corrections