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Locally localized gravity. (English) Zbl 0980.83010

Summary: We study the fluctuation spectrum of linearized gravity around non-fine-tuned branes. We focus on the case of an \(\text{AdS}_4\) brane in \(\text{AdS}_5\). In this case, for small cosmological constant, the warp factor near the brane is essentially that of a Minkowski brane. However, far from the brane, the metric differs substantially. The space includes the \(\text{AdS}_4\) boundary, so it has infinite volume. Nonetheless, for sufficiently small \(\text{AdS}_4\) cosmological constant, there is a bound state graviton in the theory, and four-dimensional gravity is reproduced. However, it is a massive bound state that plays the role of the four-dimensional graviton.

MSC:

83C05 Einstein’s equations (general structure, canonical formalism, Cauchy problems)
83E30 String and superstring theories in gravitational theory

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