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arXiv 2302.09141gr-qc
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半解析WKB方法研究类Casimir可穿越虫洞的准正规模

Quasi normal modes of a Casimir--like traversable wormhole through the semi-analytical WKB approach

Roberto Avalos, Ernesto Contreras

摘要:

在这项工作中,我们实现了半解析WKB方法来探索行为的一个标量场的遍历虫洞空间-时间与卡西米尔-类似的复杂性报告在Eur。《物理学杂志》82,420(2022)。我们估计的误差计算的准正常频率的标量场在每一个订单的WKB和最好的精度顺序是不唯一的。我们计算最小估计误差的拟正规频率的值。作为一个旁白,我们发现,拟正规模式频率的虚部接近零的基本模式模仿所谓的准共振观察到的大量标量场在Reissner-Nordström背景。

英文摘要:

In this work, we implement the semi-analytical WKB method to explore the behaviour of a scalar field on a traversable wormhole space--time with a Casimir--like complexity reported in Eur. Phys. J. C 82, 420 (2022). We estimate the error in the computation of the quasi--normal frequencies of the scalar field at each order in the WKB and show that the order with the best accuracy is not unique. We compute the value of the quasinormal frequencies for the smallest estimated error. As an aside, we find that the imaginary part of the quasinormal modes frequencies approach to zero for the fundamental mode mimicking the so--called quasi--resonance observed for massive scalar fields in the Reissner--Nordström background.

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