Bouncing and cyclic universes from brane models

Details Bouncing and cyclic universes from brane models Bouncing and cyclic universes from brane models

2002-05-17

arxiv.org/abs/hep-th/0205180v4

Phys.Lett. B547 (2002) 297-305

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, final version

Scientific paper

10.1016/S0370-2693(02)02780-6

We consider a D3-brane as boundary of a five dimensional charged anti de Sitter black hole. We show that the charge of the black hole induces a regular cosmological evolution for the scale factor of the brane, with a smooth transition between a contracting and an eventual expanding phase. Simple analytical solutions can be obtained in the case of a vanishing effective cosmological constant on the brane. A nonvanishing cosmological constant, or the inclusion of radiation on the brane, does not spoil the regularity of these solutions at small radii, and observational constraints such as the ones from primordial nucleosynthesis can be easily met. Fluctuations of brane fields remain in the linear regime provided the minimal size of the scale factor is sufficiently large. We conclude with an analysis of the Cardy-Verlinde formula in this set up.

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