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arXiv 1501.03260hep-thgr-qc
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Garfinkle-Horowitz-Strominger黑洞周围的带电标量扰动

Charged Scalar Perturbations around Garfinkle-Horowitz-Strominger Black Holes

Cheng-Yong Zhang, Shao-Jun Zhang, Bin Wang

摘要:

研究了荷电标量扰动下Garfinkle-Horowitz-Strominger(GHS)黑洞的稳定性.我们发现,与中性标量场微扰不同,在频域计算中,只有连分式法和渐近迭代法才能保持较高的计算效率和精度要求。并对这两种方法的效率进行了比较。采用适当的数值方法,我们证明了GHS黑洞在带电标量扰动下始终是稳定的。这与de Sitter和Anti-de Sitter黑洞的结果不同。我们进一步论证了在GHS黑洞背景中,入射的带电标量波不存在放大而产生超辐射,因此超辐射不稳定性不可能存在于该时空中。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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