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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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