Bouncing universes in scalar-tensor gravity around conformal invariance

被引：15
|
作者：
Boisseau, B. [1 ]
Giacomini, H. [1 ]
Polarski, D. [2 ,3 ]
机构：
[1] Univ Tours, CNRS UMR 7350, Lab Math & Phys Theor, Parc Grandmont, F-37200 Tours, France
[2] Univ Montpellier, Pl E Bataillon, F-34095 Montpellier, France
[3] CNRS, Lab Charles Coulomb, UMR 5221, Pl E Bataillon, F-34095 Montpellier, France
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2016年 / 05期
关键词：
modified gravity; dark energy theory; physics of the early universe;
D O I：
10.1088/1475-7516/2016/05/048
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
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.
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页数：14
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