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arXiv 2106.05034gr-qcastro-ph.HEhep-th
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广义相对论中的可穿越虫洞

Traversable Wormholes in General Relativity

R. A. Konoplya, A. Zhidenko

摘要:

Blazquez-Salcedo,C. Knoll,E. Radu,Phys. Rev. Lett. 126(2021)no.10,101102]在Einstein-Dirac-Maxwell理论中不使用幻影物质得到了渐近平坦的可穿越虫洞解。在那里找到的可归一化的数值解需要在喉道处有一个特殊的行为:相对于喉道的镜像对称导致引力场和物质场的非光滑性。特别是,我们必须假设在喉道处费米子电荷密度的符号发生变化,要求粒子和反粒子共存而不湮灭,并在喉道处形成具有特定性质的物质膜。显然,这种结构在自然界中不可能存在。我们发现,有虫洞的解决方案,这是不对称的喉和光滑的引力和物质场赋予,从而摆脱所有上述问题。这表明,这种虫洞配置也可以在现实的情况下得到支持。

英文摘要:

In [J. Blazquez-Salcedo, C. Knoll, E. Radu, Phys. Rev. Lett. 126 (2021) no.10, 101102] asymptotically flat traversable wormhole solutions were obtained in the Einstein-Dirac-Maxwell theory without using phantom matter. The normalizable numerical solutions found therein require a peculiar behavior at the throat: the mirror symmetry relatively the throat leads to the nonsmoothness of gravitational and matter fields. In particular, one must postulate changing of the sign of the fermionic charge density at the throat, requiring coexistence of particle and antiparticles without annihilation and posing a membrane of matter at the throat with specific properties. Apparently this kind of configuration could not exist in nature. We show that there are wormhole solutions, which are asymmetric relative the throat and endowed by smooth gravitational and matter fields, thereby being free from all the above problems. This indicates that such wormhole configurations could also be supported in a realistic scenario.

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