Anisotropic brane cosmologies with exponential potentials

Details Anisotropic brane cosmologies with exponential potentials Anisotropic brane cosmologies with exponential potentials

2003-04-11

arxiv.org/abs/gr-qc/0304046v2

Int.J.Mod.Phys. D13 (2004) 539-554

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 1 figure

Scientific paper

10.1142/S0218271804003846

We study Bianchi I type brane cosmologies with scalar matter self-interacting through combinations of exponential potentials. Such models correspond in some cases to inflationary universes. We discuss the conditions for accelerated expansion to occur, and pay particular attention to the influence of extra dimensions and anisotropy. Our results show that the associated effects evolve in such a way that they become negligible in the late time limit, those related to the anisotropy disappearing earlier. This study focuses mainly on single field models, but we also consider a generalization yielding models with multiple non-interacting fields and examine its features briefly. We conclude that in the brane scenario, as happens in general relativity, an increase in the number of fields assists inflation.

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