Numerical study of superradiant instability for charged stringy black hole-mirror system
arXiv:1412.1527 · doi:10.1016/j.physletb.2014.12.007
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.
5 pages, 5 figures, accepted by PLB. arXiv admin note: text overlap with arXiv:1403.7279