We describe a non-minimal higher-derivative extension of Einstein–Maxwell theory in which electrically-charged black holes and point charges have globally regular gravitational and electromagnetic fields. We provide an exact static, spherically symmetric solution of this theory that reduces to the Reissner–Nordstrm one at weak coupling, but in which the singularity at r = 0 is regularized for arbitrary mass and (non-vanishing) charge. We discuss the properties of these solutions and comment on the physical significance of our results.

中文翻译：

---

通过高阶导数校正来解析Reissner–Nordstrm奇点

我们描述了爱因斯坦-麦克斯韦理论的非最小高阶导数扩展，其中带电的黑洞和点电荷具有全局规则的引力场和电磁场。我们提供了此理论的精确静态，球对称解决方案，该解决方案在弱耦合时减小为Reissner–Nordstrm，但其中r = 0的奇异性针对任意质量和（不消失）电荷而正则化。我们讨论了这些解决方案的性质，并对结果的物理意义进行了评论。