Bouncing Eddingtoninspired BornInfeld cosmologies: An alternative to inflation?
Abstract
We study the dynamics of a homogeneous and isotropic FriedmannRobertsonWalker universe in the context of the Eddingtoninspired BornInfeld 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 κ>0, if w is time dependent, and we demonstrate that it is free from tensor singularities. We argue that Eddingtoninspired BornInfeld cosmologies may be a viable alternative to the inflationary paradigm as a solution to fundamental problems of the standard cosmological model.
 Publication:

Physical Review D
 Pub Date:
 August 2012
 DOI:
 10.1103/PhysRevD.86.041501
 arXiv:
 arXiv:1205.6676
 Bibcode:
 2012PhRvD..86d1501A
 Keywords:

 04.50.h;
 98.80.k;
 Higherdimensional gravity and other theories of gravity;
 Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 4 pages, 1 figure