Microscopic theory of black hole superradiance

2007/12/26 by Óscar J. C. Dias, Oscar J. C. Dias, Roberto Emparan +1 · 2 citations
Physics and Astronomy · #Astrophysical Phenomena and Observations #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #hep-th

paper · pdf · doi:10.1103/physrevd.77.064018

published as Phys.Rev.D77:064018,2008 · 33 pages, 1 figure. v2: minor corrections

arxiv created 2007/12/26 · openalex publication_date 2008/03/14 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

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<\ensuremathω<m\ensuremathΩ_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 conformal field theory. We also compute the superradiant emission rates from both sides of the correspondence, and show their agreement.

Citations

• Dynamics of D-brane Black Holes
• Second quantization in the Kerr metric
• Microscopic Origin of the Bekenstein-Hawking Entropy
• Vacuum polarization and the spontaneous loss of charge by black holes

Cited by

• Non-extremal fuzzballs and ergoregion emission
• Intertwining relations for the deformed D1D5 CFT