Nonsingular bouncing cosmologies in light of BICEP2

被引：43
|
作者：
Cai, Yi-Fu [1 ]
Quintin, Jerome [1 ]
Saridakis, Emmanuel N. [2 ,3 ]
Wilson-Ewing, Edward [4 ]
机构：
[1] McGill Univ, Dept Phys, 3600 Rue Univ, Montreal, PQ H3A 2T8, Canada
[2] Natl Tech Univ Athens, Div Phys, Athens, Greece
[3] Pontificia Univ Catolica Valparaiso, Inst Fis, Valparaiso, Chile
[4] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2014年 / 07期
基金：
加拿大自然科学与工程研究理事会;
关键词：
alternatives to inflation; gravitational waves and CMBR polarization; SPECTRUM;
D O I：
10.1088/1475-7516/2014/07/033
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We confront various nonsingular bouncing cosmologies with the recently released BICEP2 data and investigate the observational constraints on their parameter space. In particular, within the context of the effective field approach, we analyze the constraints on the matter bounce curvaton scenario with a light scalar field, and the new matter bounce cosmology model in which the universe successively experiences a period of matter contraction and an ekpyrotic phase. Additionally, we consider three nonsingular bouncing cosmologies obtained in the framework of modified gravity theories, namely the Horava-Lifshitz bounce model, the f (T) bounce model, and loop quantum cosmology.
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收藏
页数：16
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