论文标题
线性无限导数重力中的螺母电荷
NUT charge in linearized infinite derivative gravity
论文作者
论文摘要
我们研究线性（无鬼）无限衍生物重力中类似坚果源的重力场。这样的来源等同于没有张力的旋转半无限宇宙弦。总体而言，线性化（无质量的）taub-nut溶液具有曲率奇异性，以及与称为Misner String的对称轴的分布曲率相对应的拓扑缺陷。我们在线性化无限衍生物重力中发现了螺母的时空。我们表明它没有曲率奇异性以及Misner弦。我们还讨论了沿对称轴的渐近极限，该极限导致无限长度的旋转宇宙串的时空。
We study the gravitational field of the NUT-like source in the linearized (ghost-free) infinite derivative gravity. Such a source is equivalent to the spinning semi-infinite cosmic string with no tension. In general relativity, the linearized (massless) Taub-NUT solution has a curvature singularity as well as a topological defect corresponding to distributional curvature on one half of the symmetry axis called the Misner string. We find the NUT-charged spacetime in the linearized infinite derivative gravity. We show that it is free from curvature singularities as well as Misner strings. We also discuss an asymptotic limit along the symmetry axis that leads to the spacetime of a spinning cosmic string of infinite length.
