Konoplya R A, Zhidenko A
Research Centre for Theoretical Physics and Astrophysics, Institute of Physics, Silesian University in Opava, Bezručovo náměstí 13, CZ-74601 Opava, Czech Republic.
Centro de Matemática, Computaąão e Cogniąão (CMCC), Universidade Federal do ABC (UFABC), Rua Abolição, CEP: 09210-180, Santo André, São Paulo 09210-580, Brazil.
Phys Rev Lett. 2022 Mar 4;128(9):091104. doi: 10.1103/PhysRevLett.128.091104.
Blázquez-Salcedo et al. [Phys. Rev. Lett. 126, 101102 (2021)PRLTAO0031-900710.1103/PhysRevLett.126.101102] obtained asymptotically flat traversable wormhole solutions 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.
布拉兹克斯 - 萨尔塞多等人[《物理评论快报》126, 101102 (2021)PRLTAO0031 - 900710.1103/PhysRevLett.126.101102]在爱因斯坦 - 狄拉克 - 麦克斯韦理论中，不使用幻物质得到了渐近平直的可穿越虫洞解。其中找到的可归一化数值解在喉部需要一种特殊行为：相对于喉部的镜面对称性导致引力场和物质场不光滑。特别是，必须假定在喉部费米子电荷密度的符号改变，这要求粒子和反粒子共存而不湮灭，并在喉部形成具有特定性质的物质膜。显然，这种构型在自然界中不可能存在。我们表明存在相对于喉部不对称且具有光滑引力场和物质场的虫洞解，从而避免了上述所有问题。这表明这种虫洞构型在现实场景中也可能存在。
