Inhomogeneous Dark Radiation Dynamics on a de Sitter Brane

Details Inhomogeneous Dark Radiation Dynamics on a de Sitter Brane Inhomogeneous Dark Radiation Dynamics on a de Sitter Brane

2003-04-04

arxiv.org/abs/hep-th/0304038v1

Astrophys.Space Sci. 283 (2003) 537-542

Physics

High Energy Physics

High Energy Physics - Theory

6 pages, LaTeX, 1 EPS figure. Talk given at the Workshop The Cosmology of Extra Dimensions and Varying Fundamental Constants o

Scientific paper

10.1023/A:1022533524191

Assuming spherical symmetry we analyse the dynamics of an inhomogeneous dark radiation vaccum on a Randall and Sundrum 3-brane world. Under certain natural conditions we show that the effective Einstein equations on the brane form a closed system. On a de Sitter brane and for negative dark energy density we determine exact dynamical and inhomogeneous solutions which depend on the brane cosmological constant, on the dark radiation tidal charge and on its initial configuration. We also identify the conditions leading to the formation of a singularity or of regular bounces inside the dark radiation vaccum.

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