Bouncing Universes in Scalar-Tensor Gravity Around Conformal Invariance

Autor:	Boisseau, B., Giacomini, H., Polarski, D.
Rok vydání:	2016
Předmět:	General Relativity and Quantum Cosmology Astrophysics - Cosmology and Nongalactic Astrophysics High Energy Physics - Theory
Druh dokumentu:	Working Paper
DOI:	10.1088/1475-7516/2016/05/048
Popis:	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. Comment: 15 pages, 13 figures; Added references, version to appear in JCAP
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1603.06648 Zobrazit plný text záznamu View this record from Arxiv