Charged scalar perturbations around Garfinkle-Horowitz-Strominger black holes
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Publication:5964145
DOI10.1016/J.NUCLPHYSB.2015.07.030zbMATH Open1331.83055arXiv1501.03260OpenAlexW1516362688MaRDI QIDQ5964145
Author name not available (Why is that?)
Publication date: 26 February 2016
Published in: (Search for Journal in Brave)
Abstract: We examine the stability of the Garfinkle-Horowitz-Strominger (GHS) black hole under charged scalar perturbations. We find that different from the neutral scalar field perturbations, only two numerical methods, such as the continued fraction method and the asymptotic iteration method, can keep high efficiency and accuracy requirements in the frequency domain computations. The comparisons of the efficiency between these two methods have also been done. Employing the appropriate numerical method, we show that the GHS black hole is always stable against charged scalar perturbations. This is different from the result obtained in the de Sitter and Anti-de Sitter black holes. Furthermore we argue that in the GHS black hole background there is no amplification of the incident charged scalar wave to cause the superradiance, so that the superradiant instability cannot exist in this spacetime.
Full work available at URL: https://arxiv.org/abs/1501.03260
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