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Superradiance in static black hole spacetimes

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arxiv 1511.02634 v1 pith:IMML2R7J submitted 2015-11-09 gr-qc

Carolina L. Benone , Luís C. B. Crispino This is my paper · ORCID
classification gr-qc
keywords absorptionblackcrossscalarsectionamplifiedarbitrarybackground
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We investigate the absorption of a massive and charged scalar field in a Reissner-Nordstr\"om 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.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Absorption spectrum and greybody factors of charged black holes in loop quantum gravity

    gr-qc 2026-08 conditional novelty 6.0 of 10

    The absorption cross section of massless scalar waves by a charged loop-quantum-gravity black hole increases with the quantum parameter in an intermediate frequency band, decreases with charge, and matches classical a...

  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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