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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2012

Autores

Avelino, PP (Autor) FCUP; Ferreira, RZ (Autor) Outra

Revista

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

Vol. 86 Nº 025008

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 115 Citações

Scopus - 120 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 4