Anisotropic multiple bounce models

Anna Paula Bacalhau, Patrick Peter, and Sandro D. P. Vitenti
Phys. Rev. D 96, 023517 – Published 17 July 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.

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  • Received 11 May 2017

DOI:https://doi.org/10.1103/PhysRevD.96.023517

© 2017 American Physical Society

Physics Subject Headings (PhySH)

Gravitation, Cosmology & Astrophysics

Authors & Affiliations

Anna Paula Bacalhau1,*, Patrick Peter2,†, and Sandro D. P. Vitenti3,1,‡

  • 1ICRA—Centro Brasileiro de Pesquisas Físicas, Xavier Sigaud, 150 Urca, Rio de Janeiro, Brazil
  • 2Institut d’Astrophysique de Paris (GRϵCO), UMR 7095, and Institut Lagrange de Paris Université Pierre & Marie Curie (Paris 6) et CNRS, Sorbonne Universités 98 bis boulevard Arago, 75014 Paris, France
  • 3Centre for Cosmology, Particle Physics and Phenomenology, Institute of Mathematics and Physics, Louvain University, 2 Chemin du Cyclotron, 1348 Louvain-la-Neuve, Belgium

  • *anna@cbpf.br
  • peter@iap.fr
  • sandro.vitenti@uclouvain.be

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Issue

Vol. 96, Iss. 2 — 15 July 2017

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