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Anisotropic multiple bounce models.

Authors :
Bacalhau, Anna Paula
Peter, Patrick
Vitenti, Sandro D. P.
Source :
Physical Review D: Particles, Fields, Gravitation & Cosmology. 7/15/2017, Vol. 96 Issue 2, p1-1. 1p.
Publication Year :
2017

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
24700010
Volume :
96
Issue :
2
Database :
Academic Search Index
Journal :
Physical Review D: Particles, Fields, Gravitation & Cosmology
Publication Type :
Periodical
Accession number :
124522276
Full Text :
https://doi.org/10.1103/PhysRevD.96.023517