On Cosmological Perturbations on a Brane in an Anti-de Sitter Bulk

Details On Cosmological Perturbations on a Brane in an Anti-de Sitter Bulk On Cosmological Perturbations on a Brane in an Anti-de Sitter Bulk

2000-12-08

arxiv.org/abs/hep-th/0012073v1

Physics

High Energy Physics

High Energy Physics - Theory

8 pages, no figure

Scientific paper

In this paper, we consider cosmological perturbations on a brane universe embedded in an Anti-de Sitter bulk. We use a novel gauge, in which the full five-dimensional problem is in principle solvable. In this gauge we derive the equations for scalar, vector and tensor perturbations. These equations are necessary in order to calculate microwave background anisotropies in this particular scenario. Throughout the paper, we draw attention to the influence of the bulk gravitons, which act as a source for the perturbations on the brane. In addition, we find that isocurvature modes are generated due to the influence of bulk gravitons.

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