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Stability of Reissner-Nordström black hole in de Sitter background under charged scalar perturbation (1405.4931v4)
Published 20 May 2014 in hep-th and gr-qc
Abstract: We find a new instability in the four-dimensional Reissner-Nordstrom-de Sitter black holes against charged scalar perturbations with vanishing angular momentum, $l=0$. We show that such an instability is caused by superradiance. The instability does not occur for an larger angular index, as explicitely proven for $l=1$. Our results are obtained from a numerical investigation of the time domain profiles of the perturbations.
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