Bouncing Eddington-inspired Born-Infeld cosmologies: an alternative to Inflation ?

Дата и время публикации : 2012-05-30T13:44:11Z

Авторы публикации и институты :
P. P. Avelino
R. Z. Ferreira

Ссылка на журнал-издание: Phys.Rev.D86:041501(R),2012
Коментарии к cтатье: 4 pages, 1 figure
Первичная категория: astro-ph.CO

Все категории : astro-ph.CO, gr-qc, hep-ph, hep-th

Краткий обзор статьи: 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.

Category: Physics