Anti-de Sitter Fragmentation

Details Anti-de Sitter Fragmentation Anti-de Sitter Fragmentation

1998-12-08

arxiv.org/abs/hep-th/9812073v2

JHEP 9902:011,1999

Physics

High Energy Physics

High Energy Physics - Theory

harvmac (uses epsf), 27 pages with 6 eps figures

Scientific paper

10.1088/1126-6708/1999/02/011

Low-energy, near-horizon scaling limits of black holes which lead to string theory on AdS_2 x S^2 are described. Unlike the higher-dimensional cases, in the simplest approach all finite-energy excitations of AdS_2 x S^2 are suppressed. Surviving zero-energy configurations are described. These can include tree-like structures in which the AdS_2 x S^2 throat branches as the horizon is approached, as well as disconnected AdS_2 x S^2 universes. In principle, the black hole entropy counts the quantum ground states on the moduli space of such configurations. In a nonsupersymmetric context AdS_D for general D can be unstable against instanton-mediated fragmentation into disconnected universes. Several examples are given.

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