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Superradiance of a charged scalar field coupled to the Einstein-Maxwell equations

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arxiv 1610.08352 v2 pith:56ERLY77 submitted 2016-10-26 gr-qc

Olaf Baake , Oliver Rinne This is my paper · ORCID
classification gr-qc
keywords fieldequationsscalarblackholemasssuperradianceasymptotically
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We consider the Einstein-Maxwell-Klein-Gordon equations for a spherically symmetric scalar field scattering off a Reissner-Nordstr\"om black hole in asymptotically flat spacetime. The equations are solved numerically using a hyperboloidal evolution scheme. For suitable frequencies of the initial data, superradiance is observed, leading to a substantial decrease of mass and charge of the black hole. We also derive a Bondi mass loss formula using the Kodama vector field and investigate the late-time decay of the scalar field.

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Cited by 3 Pith papers

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  1. 3d Summation-by-Parts scheme for Linear Wave Equations on Hyperboloidal Slices

    gr-qc 2026-06 unverdicted novelty 7.0 of 10

    Derives a provably stable 3D SBP scheme for linear waves on hyperboloidal slices using compactification, rescaling, and abstract dissipation in spherical polar coordinates.

  2. Superradiance of Charged Static Black Hole in Cubic Gravity

    gr-qc 2025-05 conditional novelty 4.0 of 10

    A charged black hole in Einstein-cubic gravity, built from first-law consistency and a continued fraction metric, amplifies charged scalar waves below the standard Reissner-Nordstrom superradiance threshold, with stro...

  3. Superradiance -- the 2020 Edition

    gr-qc 2015-01 unverdicted novelty 4.0 of 10

    Black-hole superradiance extracts energy via the ergoregion and can trigger instabilities with applications to dark matter, beyond-Standard-Model physics, and laboratory analogs.

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