Dynamical Instabilities of the Randall-Sundrum Model

Details Dynamical Instabilities of the Randall-Sundrum Model Dynamical Instabilities of the Randall-Sundrum Model

2001-02-21

arxiv.org/abs/hep-th/0102144v2

Phys.Rev. D64 (2001) 063504

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 2 figures

Scientific paper

10.1103/PhysRevD.64.063504

We derive dynamical equations to describe a single 3-brane containing fluid matter and a scalar field coupling to the dilaton and the gravitational field in a five dimensional bulk. First, we show that a scalar field or an arbitrary fluid on the brane cannot evolve to cancel the cosmological constant in the bulk. Then we show that the Randall-Sundrum model is unstable under small deviations from the fine-tuning between the brane tension and the bulk cosmological constant and even under homogeneous gravitational perturbations. Implications for brane world cosmologies are discussed.

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