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Small Kerr-anti-de Sitter black holes are unstable
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Small Kerr-anti-de Sitter black holes are unstable
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Superradiance in black hole spacetimes can trigger instabilities. Here we show that, due to superradiance, small Kerr-anti-de Sitter black holes are unstable. Our demonstration uses a matching procedure, in a long wavelength approximation.
Forward citations
Cited by 3 Pith papers
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Massless scalar scattering by Kerr-Bertotti-Robinson black holes:transparent-end channels and superradiance
In the transparent-end model, scalar superradiance on Kerr–BR black holes operates only when both the horizon frequency gate and the outer propagation gate are open, and the propagation gate closes the window at BM≈0....
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Scalarization and superradiant instability of black hole induced by dark matter halo in the scalar-tensor theory of gravity
Black holes with dark matter halos in scalar-tensor gravity exhibit scalarization and superradiant instability in some parameter regions, with halo size and mass affecting outcomes for small halos but coupling constan...
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Superradiance -- the 2020 Edition
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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