Gravity, Stability and Energy Conservation on the Randall-Sundrum Brane-World

Details Gravity, Stability and Energy Conservation on the Randall-Sundrum Brane-World Gravity, Stability and Energy Conservation on the Randall-Sundrum Brane-World

1999-12-23

arxiv.org/abs/hep-th/9912233v3

Phys.Rev.D62:024008,2000

Physics

High Energy Physics

High Energy Physics - Theory

10 pages, references added

Scientific paper

10.1103/PhysRevD.62.024008

We carefully investigate the gravitational perturbation of the Randall-Sundrum (RS) single brane-world solution [hep-th/9906064], based on a covariant curvature tensor formalism recently developed by us. Using this curvature formalism, it is known that the `electric' part of the 5-dimensional Weyl tensor, denoted by $E_{\mu\nu}$, gives the leading order correction to the conventional Einstein equations on the brane. We consider the general solution of the perturbation equations for the 5-dimensional Weyl tensor caused by the matter fluctuations on the brane. By analyzing its asymptotic behaviour in the direction of the 5th dimension, we find the curvature invariant diverges as we approach the Cauchy horizon. However, in the limit of asymptotic future in the vicinity of the Cauchy horizon, the curvature invariant falls off fast enough to render the divergence harmless to the brane-world. We also obtain the asymptotic behavior of $E_{\mu\nu}$ on the brane at spatial infinity, assuming the matter perturbation is localized. We find it falls off sufficiently fast and will not affect the conserved quantities at spatial infinity. This indicates strongly that the usual conservation law, such as the ADM energy conservation, holds on the brane as far as asymptotically flat spacetimes are concerned.

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