Bouncing universes in scalar-tensor gravity around conformal invariance

Journal Article · Sun May 01 00:00:00 EDT 2016 · Journal of Cosmology and Astroparticle Physics

DOI:https://doi.org/10.1088/1475-7516/2016/05/048· OSTI ID:22667555

Boisseau, B.; Giacomini, H. ^[1]

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1. Université de Tours, Laboratoire de Mathématiques et Physique Théorique, CNRS/UMR 7350, Parc de Grandmont, Tours, 37200 France (France)

We consider the possibility to produce a bouncing universe in the framework of scalar-tensor gravity when the scalar field has a nonconformal coupling to the Ricci scalar. We prove that bouncing universes regular in the future with essentially the same dynamics as for the conformal coupling case do exist when the coupling deviates slightly from it. This is found numerically for more substantial deviations as well. In some cases however new features are found like the ability of the system to leave the effective phantom regime.

• OSTI ID: 22667555
• Journal Information: Journal of Cosmology and Astroparticle Physics, Vol. 2016, Issue 05; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CONFORMAL INVARIANCE
GRAVITATION
PHANTOMS
RICCI TENSOR
SCALAR FIELDS
UNIVERSE