Brane World Cosmological Perturbations

Details Brane World Cosmological Perturbations Brane World Cosmological Perturbations

2004-03-15

arxiv.org/abs/hep-th/0403155v1

Phys.Rev. D70 (2004) 043542

Physics

High Energy Physics

High Energy Physics - Theory

16 pages, one figure

Scientific paper

10.1103/PhysRevD.70.043542

We consider a brane world and its gravitational linear perturbations. We present a general solution of the perturbations in the bulk and find the complete perturbed junction conditions for generic brane dynamics. We also prove that (spin 2) gravitational waves in the great majority of cases can only arise in connection with a non-vanishing anisotropic stress. This has far reaching consequences for inflation in the brane world. Moreover, contrary to the case of the radion, perturbations are stable.

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