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Cosmological dynamics of brane f(Script R) gravity

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Published 22 February 2012 Published under licence by IOP Publishing Ltd
, , Citation Zahra Haghani et al JCAP02(2012)031 DOI 10.1088/1475-7516/2012/02/031

1475-7516/2012/02/031

Abstract

The cosmological dynamics of a brane world scenario where the bulk action is taken as a generic function of the Ricci scalar is considered in a framework where the use of the Bbb Z2 symmetry and Israel junction conditions are relaxed. The corresponding cosmological solutions for some specific forms of f(Script R) are obtained and shown to be in the form of exponential as well as power law for a vacuum brane space-time. It is shown that the existence of matter dominated epoch for a bulk action in the form of a power law for Script R can only be obtained in the presence of ordinary matter. Using phase space analysis, we show that the universe must start from an unstable matter dominated epoch and eventually falls into a stable accelerated expanding phase.

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