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Title: Bouncing universes in scalar-tensor gravity models admitting negative potentials

Abstract

We consider the possibility to produce a bouncing universe in the framework of scalar-tensor gravity models in which the scalar field potential may be negative, and even unbounded from below. We find a set of viable solutions with nonzero measure in the space of initial conditions passing a bounce, even in the presence of a radiation component, and approaching a constant gravitational coupling afterwards. Hence we have a model with a minimal modification of gravity in order to produce a bounce in the early universe with gravity tending dynamically to general relativity (GR) after the bounce.

Authors:
;  [1];  [2]
  1. Université de Tours, Laboratoire de Mathématiques et Physique Théorique, CNRS/UMR 7350, 37200 Tours (France)
  2. Université Montpellier and CNRS, Laboratoire Charles Coulomb, UMR 5221, F-34095 Montpellier (France)
Publication Date:
OSTI Identifier:
22525743
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 07; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COUPLING; GENERAL RELATIVITY THEORY; GRAVITATION; MATHEMATICAL SOLUTIONS; POTENTIALS; SCALAR FIELDS; SCALARS; SPACE; TENSORS; UNIVERSE

Citation Formats

Boisseau, B., Giacomini, H., Polarski, D., and Starobinsky, A.A., E-mail: bruno.boisseau@lmpt.univ-tours.fr, E-mail: hector.giacomini@lmpt.univ-tours.fr, E-mail: david.polarski@umontpellier.fr, E-mail: alstar@landau.ac.ru. Bouncing universes in scalar-tensor gravity models admitting negative potentials. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/07/002.
Boisseau, B., Giacomini, H., Polarski, D., & Starobinsky, A.A., E-mail: bruno.boisseau@lmpt.univ-tours.fr, E-mail: hector.giacomini@lmpt.univ-tours.fr, E-mail: david.polarski@umontpellier.fr, E-mail: alstar@landau.ac.ru. Bouncing universes in scalar-tensor gravity models admitting negative potentials. United States. https://doi.org/10.1088/1475-7516/2015/07/002
Boisseau, B., Giacomini, H., Polarski, D., and Starobinsky, A.A., E-mail: bruno.boisseau@lmpt.univ-tours.fr, E-mail: hector.giacomini@lmpt.univ-tours.fr, E-mail: david.polarski@umontpellier.fr, E-mail: alstar@landau.ac.ru. 2015. "Bouncing universes in scalar-tensor gravity models admitting negative potentials". United States. https://doi.org/10.1088/1475-7516/2015/07/002.
@article{osti_22525743,
title = {Bouncing universes in scalar-tensor gravity models admitting negative potentials},
author = {Boisseau, B. and Giacomini, H. and Polarski, D. and Starobinsky, A.A., E-mail: bruno.boisseau@lmpt.univ-tours.fr, E-mail: hector.giacomini@lmpt.univ-tours.fr, E-mail: david.polarski@umontpellier.fr, E-mail: alstar@landau.ac.ru},
abstractNote = {We consider the possibility to produce a bouncing universe in the framework of scalar-tensor gravity models in which the scalar field potential may be negative, and even unbounded from below. We find a set of viable solutions with nonzero measure in the space of initial conditions passing a bounce, even in the presence of a radiation component, and approaching a constant gravitational coupling afterwards. Hence we have a model with a minimal modification of gravity in order to produce a bounce in the early universe with gravity tending dynamically to general relativity (GR) after the bounce.},
doi = {10.1088/1475-7516/2015/07/002},
url = {https://www.osti.gov/biblio/22525743}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 07,
volume = 2015,
place = {United States},
year = {Wed Jul 01 00:00:00 EDT 2015},
month = {Wed Jul 01 00:00:00 EDT 2015}
}