Microscopic Theory of Black Hole Superradiance

Details Microscopic Theory of Black Hole Superradiance Microscopic Theory of Black Hole Superradiance

2007-12-05

arxiv.org/abs/0712.0791v2

Phys.Rev.D77:064018,2008

Physics

High Energy Physics

High Energy Physics - Theory

33 pages, 1 figure. v2: minor corrections

Scientific paper

10.1103/PhysRevD.77.064018

We study how black hole superradiance appears in string microscopic models of rotating black holes. In order to disentangle superradiance from finite-temperature effects, we consider an extremal, rotating D1-D5-P black hole that has an ergosphere and is not supersymmetric. We explain how the microscopic dual accounts for the superradiant ergosphere of this black hole. The bound 0< omega < m Omega_H on superradiant mode frequencies is argued to be a consequence of Fermi-Dirac statistics for the spin-carrying degrees of freedom in the dual CFT. We also compute the superradiant emission rates from both sides of the correspondence, and show their agreement.

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