arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1807.05080gr-qc
收藏

非对称圆柱薄壳虫洞的稳定性

The Stability of Asymmetric Cylindrical Thin-Shell Wormholes

S. Danial Forghani, S. Habib Mazharimousavi, M. Halilsoy

摘要:

在继续前面的工作介绍不对称薄壳虫孔作为一个新兴的类的可穿越的虫孔的上下文中,这个时候的圆柱对称时空被利用来构建这样的虫孔。在建立了一个通用的表述之后,首先一般地研究了Linet-Tian度规,然后更详细地研究了宇宙弦度规和黑弦度规作为圆柱形非对称薄壳虫洞的构造块。相应的虫洞内的线性稳定性分析框架进行了研究,首先,证明它们可以存在的机械稳定性的角度来看,其次,表明在每种情况下的稳定性和对称性之间的相关性,如果有任何在所有。从这里,我们已经提取了两个例子的稳定性随不对称度变化的模式;然而,据观察,对称状态不是最不稳定的状态。也有一些副结果:据了解,任何由两个宇宙弦宇宙组成的圆柱形薄壳虫洞都不能被正压状态方程所支持。此外,作为另一个侧面的结果,有人认为,所谓的变量状态方程的半径依赖性,这是在这篇文章中使用的所有,有很大的影响的机械稳定性的圆柱形非对称薄壳虫孔研究在这个简短的。

英文摘要:

In continuation of a preceding work on introducing asymmetric thin-shell wormholes as an emerging class of traversable wormholes within the context, this time cylindrically symmetric spacetimes are exploited to construct such wormholes. Having established a generic formulation, first the Linet-Tian metric generally, and then the cosmic string metric and a black string metric in greater details are studied as constructing blocks of cylindrical asymmetric thin-shell wormholes. The corresponding wormholes are investigated within the linearized stability analysis framework to firstly, demonstrate that they can exist from the mechanical stability point of view, and secondly, indicate the correlation between the stability and symmetry in each case, if there is any at all. From here, we have extracted a pattern for the way stability changes with the asymmetry degree for the two examples; however, it was observed that the symmetric state is not the most neither the less stable state. There are also some side results: It was learned that any cylindrical thin-shell wormhole made of two cosmic string universes cannot be supported by a barotropic equation of state. Furthermore, as another side outcome, it was perceived that the radius dependency of the so-called variable equation of state, which is used all over this article, has a great impact on the mechanical stability of the cylindrical asymmetric thin-shell wormholes studied in this brief.

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。

↑