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arXiv 2004.05879gr-qchep-th
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Schwarzschild-de Sitter时空中Dirac场的非明显稳定性

Non-evident stability of a Dirac field in Schwarzschild-de Sitter spacetime

R. A. Konoplya, M. S. Churilova

摘要:

狄拉克场在史瓦西时空中的扰动由两个波方程(对于两个手征)表征,其有效势是等谱的,其中一个是正定的。因此,狄拉克场在史瓦西背景下的稳定性是简单的。但对于Schwarzschild-de Sitter情形则不是这样,因为两种手征性的势函数都有负的能隙,并且在渐近de Sitter情形中稳定性不能自动得到保证的事实在文献中显然被忽略了。执行的波动方程的时域积分,从而考虑到所有的准正规模式的频谱,我们证明了狄拉克场的稳定性在Schwarzschild-de Sitter时空。稳定性的分析也扩展到Reissner-Nordstrom-de Sitter解决方案。

英文摘要:

Perturbations of the Dirac field in the Schwarzschild spacetime are characterized by two wave equations (for two chiralities) with effective potentials which are iso-spectral and one of which is positive definite. Therefore, the stability of a Dirac field in the Schwarzschild background is straightforward. This is not so for the Schwarzschild-de Sitter case, because potentials for both chiralities have negative gaps and the fact that the stability is not automatically guaranteed in the asymptotically de Sitter case was apparently omitted in the literature. Performing the time-domain integration of the wave equations and, thereby, taking into consideration all the quasinormal modes of the spectrum, we demonstrate stability of the Dirac field in the Schwarzschild-de Sitter spacetime. The analysis of stability is extended also to the Reissner-Nordstrom-de Sitter solution.

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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