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Numerical study of superradiant instability for charged stringy black hole-mirror system

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arxiv 1412.1527 v1 pith:SU42Z5ER submitted 2014-12-04 gr-qc hep-th

Ran Li , Junkun Zhao This is my paper · ORCID
classification gr-qchep-th
keywords blackchargechargedfieldinstabilityscalarholenumerical
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abstract

We numerically study the superradiant instability of charged massless scalar field in the background of charged stringy black hole with mirror-like boundary condition. We compare the numerical result with the previous analytical result and show the dependencies of this instability upon various parameters of black hole charge $Q$, scalar field charge $q$, and mirror radius $r_m$. Especially, we have observed that imaginary part of BQN frequencies grows with the scalar field charge $q$ rapidly.

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  1. Superradiant instability of charged scalar fields in higher-dimensional Reissner-Nordstr\"om-de Sitter black holes

    gr-qc 2019-08 conditional novelty 5.0 of 10

    Charged scalar perturbations of higher-dimensional Reissner-Nordström-de Sitter black holes are superradiantly unstable, with the growth rate increasing with spacetime dimension.

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