Perturbations of brane worlds

Details Perturbations of brane worlds Perturbations of brane worlds

2000-10-24

arxiv.org/abs/hep-th/0010215v2

Phys.Rev. D63 (2001) 083513

Physics

High Energy Physics

High Energy Physics - Theory

19 pages, no figures, RevTex, version to appear in Phys.Rev.D; minor changes in chap.V, polarisation tensor at page 13 correct

Scientific paper

10.1103/PhysRevD.63.083513

We consider cosmological models where the universe, governed by Einstein's equations, is a piece of a five dimensional double-sided anti-de Sitter spacetime (that is, a "$Z_2$-symmetric bulk") with matter confined to its four dimensional Robertson-Walker boundary or "brane". We study the perturbations of such models. We use conformally minkowskian coordinates to disentangle the contributions of the bulk gravitons and of the motion of the brane. We find the restrictions put on the bulk gravitons when matter on the brane is taken to be a scalar field and we solve in that case the brane perturbation equations.

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