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arXiv 1706.01447gr-qchep-th
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用$S$形变检验黑洞稳定性的一个简单方法

A simple test for stability of black hole by $S$-deformation

Masashi Kimura

摘要:

研究了当线性微扰主方程为薛定谔方程时,证明黑洞稳定性的一个充分条件。当势函数中含有一个小的负区域时,通常用$S$ -形变方法来证明不存在失稳模态。然而,在某些情况下,很难找到一个合适的变形函数分析,因为到目前为止,唯一已知的方法来找到它是一个尝试和错误的方法。在本文中,我们表明,它是很容易找到一个规则的变形函数,通过数值求解微分方程,使变形势无处不在,当时空是稳定的。即使时空几乎是边缘稳定的,我们的方法仍然有效。我们还讨论了一个简单的玩具模型,它可以解析求解,并表明在我们的方法中,不存在束缚态的条件是相同的微分方程的正则解的存在。从这些结果中,我们推测,我们的标准也是一个必要条件。

英文摘要:

We study a sufficient condition to prove the stability of a black hole when the master equation for linear perturbation takes the form of the Schrödinger equation. If the potential contains a small negative region, usually, the $S$-deformation method was used to show the non-existence of unstable mode. However, in some cases, it is hard to find an appropriate deformation function analytically because the only way known so far to find it is a try-and-error approach. In this paper, we show that it is easy to find a regular deformation function by numerically solving the differential equation such that the deformed potential vanishes everywhere, when the spacetime is stable. Even if the spacetime is almost marginally stable, our method still works. We also discuss a simple toy model which can be solved analytically, and show the condition for the non-existence of a bound state is the same as that for the existence of a regular solution for the differential equation in our method. From these results, we conjecture that our criteria is also a necessary condition.

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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