Brane cosmology with R_(4) term in the bulk

Details Brane cosmology with R_(4) term in the bulk Brane cosmology with R_(4) term in the bulk

2006-12-27

arxiv.org/abs/gr-qc/0612162v4

Acta Phys.Polon.B39:1795-1809,2008

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

15 pages, to appear in Acta Phys. Pol. B

Scientific paper

We consider brane cosmology when the 4D Ricci scalar term is added to the 5D Einstein-Hilbert action and discuss the role that the addition of this term has on the brane-bulk system. The induced brane dynamics is shown to be the usual Einstein dynamics coupled to a modified energy-momentum tensor which is well defined once the 5D Einstein equations are solved in the bulk. The 5D Einstein equations valid everywhere in the bulk, but not in the brane, are projected on the brane. Then making use for the embedding of the brane in the bulk of the Israel junction conditions, modified by a source term coming from the addition of the intrinsic curvature scalar in the bulk action, it is possible to obtain the effective 4D Einstein equations on the brane consistent with the bulk geometry.

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