Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time domain analysis of superradiant instability for the charged stringy
  black hole-mirror system   It has been proved that the charged stringy black holes are stable under the
perturbations of massive charged scalar fields. However, superradiant
instability can be generated by adding the mirror-like boundary condition to
the composed system of charged stringy black hole and scalar field. The
unstable boxed quasinormal modes have been calculated by using both analytical
and numerical method. In this paper, we further provide a time domain analysis
by performing a long time evolution of charged scalar field configuration in
the background of the charged stringy black hole with the mirror-like boundary
condition imposed. We have used the ingoing Eddington-Finkelstein coordinates
to derive the evolution equation, and adopted Pseudo-spectral method and the
forth-order Runge-Kutta method to evolve the scalar field with the initial
Gaussian wave packet. It is shown by our numerical scheme that Fourier
transforming the evolution data coincides well with the unstable modes computed
from frequency domain analysis. The existence of the rapid growth mode makes
the charged stringy black hole a good test ground to study the nonlinear
development of superradiant instability.

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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: atom-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: solv-int
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The categories of this paper are: bayes-an
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: econ
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The categories of this paper are: q-alg