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

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Avelino, PP (Author) FCUP; Ferreira, RZ (Author) Other

Journal

Title: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 86 No. 025008

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 115 Citations

Scopus - 120 Citations

Other information

Authenticus ID: P-002-708

DOI: 10.1103/physrevd.86.041501

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 4