Bouncing Universes in Scalar-Tensor Gravity Models admitting Negative Potentials

Autor:	Boisseau, B., Giacomini, H., Polarski, D., Starobinsky, A. A.
Rok vydání:	2015
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Theory
Zdroj:	JCAP07(2015)002
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2015/07/002
Popis:	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. Comment: 12 pages, Improved presentation with 4 figures, Results and conclusions unchanged
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1504.07927 Zobrazit plný text záznamu View this record from Arxiv