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Microscopic theory of black hole superradiance

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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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DIAS, Óscar J. C., EMPARAN GARCÍA DE SALAZAR, Roberto A. and MACCARRONE HEREDIA, Alessandro. Microscopic theory of black hole superradiance. Physical Review D. 2008. Vol. 77, num. 6, pags. 064018-1-064018-19. ISSN 0556-2821. [consulted: 31 of May of 2026]. Available at: https://hdl.handle.net/2445/12386

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