Brane cosmological perturbations

Details Brane cosmological perturbations Brane cosmological perturbations

2000-05-02

arxiv.org/abs/hep-th/0005025v1

Phys.Rev. D62 (2000) 126012

Physics

High Energy Physics

High Energy Physics - Theory

14 pages, Latex; no figure

Scientific paper

10.1103/PhysRevD.62.126012

We address the question of cosmological perturbations in the context of brane cosmology, where our Universe is a three-brane where matter is confined, whereas gravity lives in a higher dimensional spacetime. The equations governing the bulk perturbations are computed in the case of a general warped universe. The results are then specialized to the case of a five-dimensional spacetime, scenario which has recently attracted a lot of attention. In this context, we decompose the perturbations into `scalar', `vector' and `tensor' modes, which are familiar in the standard theory of cosmological perturbations. The junction conditions, which relate the metric perturbations to the matter perturbations in the brane, are then computed.

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