Bouncing universes in string-inspired gravity

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Published 13 March 2006 IOP Publishing Ltd
, , Citation Tirthabir Biswas et al JCAP03(2006)009 DOI 10.1088/1475-7516/2006/03/009

1475-7516/2006/03/009

Abstract

We consider the effects on cosmology of higher derivative modifications of gravity that make it asymptotically free without introducing ghosts. The weakening of gravity at short distances allows pressure to prevent a singularity, producing a solution with contraction preceding expansion.

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10.1088/1475-7516/2006/03/009