The effects of curvature correction terms on brane cosmology

Details The effects of curvature correction terms on brane cosmology The effects of curvature correction terms on brane cosmology

2004-02-25

arxiv.org/abs/gr-qc/0402115v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

16 pages, no figures, Invited talk given at Tenth Marcel Grossmann Meeting, Rio de Janeiro, July 20-26, 2003

Scientific paper

We study the cosmology of the Randall-Sundrum brane-world where the Einstein-Hilbert action is modified by curvature correction terms: a four-dimensional scalar curvature from induced gravity on the brane, and a five-dimensional Gauss-Bonnet curvature term. The combined effect of these curvature corrections to the action removes the infinite-density big bang singularity, although the curvature can still diverge for some parameter values. A radiation brane undergoes accelerated expansion near the minimal scale factor, for a range of parameters. This acceleration is driven by the geometric effects, without an inflaton field or negative pressures. At late times, conventional cosmology is recovered.

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