标题： 可穿越的虫洞在爱因斯坦-狄拉克-麦克斯韦理论中 显示英文标题

标题： Traversable wormholes in Einstein-Dirac-Maxwell theory

摘要： 我们构造了一个四维时空的爱因斯坦-狄拉克-麦克斯韦理论中可穿越虫洞类别的具体示例，而无需任何形式的奇异物质。限制在一个具有两个处于单态旋量状态的重费米子模型中，我们展示了存在球对称的渐近平坦配置，这些配置没有奇点，代表局域状态。这些解满足广义的Smarr关系，与极端Reissner-Nordström黑洞有关。它们还具有有限质量$M$和电荷$Q_e$，其中$Q_e/M>1$。还报告了一个具有未规范化的无质量费米子的精确虫洞解。 显示英文摘要

摘要： We construct a specific example of a class of traversable wormholes in Einstein-Dirac-Maxwell theory in four spacetime dimensions, without needing any form of exotic matter. Restricting to a model with two massive fermions in a singlet spinor state, we show the existence of spherically symmetric asymptotically flat configurations which are free of singularities, representing localized states. These solutions satisfy a generalized Smarr relation, being connected with the extremal Reissner-Nordstr\"om black holes. They also possess a finite mass $M$ and electric charge $Q_e$, with $Q_e/M>1$. An exact wormhole solution with ungauged, massless fermions is also reported.