Superradiance in static black hole spacetimes

Abstract

We investigate the absorption of a massive and charged scalar field in a Reissner-Nordström background. We compare our numerical results for the absorption cross section, obtained for arbitrary frequencies, with the low- and high-frequency limits. We find, in particular, that the total absorption cross section can be negative, showing that planar scalar waves can be superradiantly amplified by black holes.

References in corpus (7)

• Scattering and absorption of gravitational plane waves by rotating black holes
• Fermion scattering by a Schwarzschild black hole
• Absorption of a massive scalar field by a charged black hole
• Electromagnetic wave scattering by Schwarzschild black holes
• Inferring black hole charge from backscattered electromagnetic radiation
• Absorption by dirty black holes: null geodesics and scalar waves
• Low-frequency absorption cross section of the electromagnetic waves for the extreme Reissner-Nordstrom black holes in higher dimensions

Cited by in corpus (38)

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• Superradiant instability and charged scalar quasinormal modes for $2+1$-dimensional Coulomb-like AdS black holes from nonlinear electrodynamics
• Absorption of electromagnetic plane waves by rotating black holes
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• Superradiant Instabilities in a Class of Scalar-Tensor Horndeski Theory
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• Schwarzschild-like black holes: Light-like trajectories and massless scalar absorption
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• Tunnelling of Charged Particles from Black Holes
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• Scattering by deformed black holes
• Charged black holes in de Sitter space: superradiant amplification of charged scalar waves and resonant hyperradiation
• Analytical investigation of wave absorption by a rotating black hole analogue
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