Bouncing Eddington-inspired Born-Infeld cosmologies: An alternative to inflation?

被引：119

作者：

Avelino, P. P. ^{[1
,2
]}

Ferreira, R. Z. ^{[2
]}

机构：

[1] Univ Porto, Ctr Astrofis, P-4150762 Oporto, Portugal

[2] Univ Porto, Fac Ciencias, Dept Fis & Astron, P-4169007 Oporto, Portugal

来源：

PHYSICAL REVIEW D | 2012年 / 86卷 / 04期

关键词：

GRAVITY;

D O I：

10.1103/PhysRevD.86.041501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the dynamics of a homogeneous and isotropic Friedmann-Robertson-Walker universe in the context of the Eddington-inspired Born-Infeld theory of gravity. We generalize earlier results, obtained in the context of a radiation dominated universe, to account for the evolution of a universe permeated by a perfect fluid with an arbitrary equation of state parameter w. We show that a bounce may occur for kappa > 0, if w is time dependent, and we demonstrate that it is free from tensor singularities. We argue that Eddington-inspired Born-Infeld cosmologies may be a viable alternative to the inflationary paradigm as a solution to fundamental problems of the standard cosmological model.

引用

页数：4

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