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arXiv 2207.04014hep-thgr-qc
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Eguchi-Hanson空间的高曲率推广

Higher-curvature generalization of Eguchi-Hanson spaces

Cristóbal Corral, Daniel Flores-Alfonso, Gastón Giribet, Julio Oliva

摘要:

在广义相对论的高曲率变形下,我们构造了江口-汉森引力瞬子的高维推广。这些空间是爱因斯坦引力的解,补充了任意偶数维$D=2m\geq 4$中的二次陈-高斯-博内不变量的维扩展,并且它们是由$(2m-2)$维Kähler-Einstein流形上的非平凡纤维化构造的。这些解决方案的不同方面进行了分析,其中,正则化的壳欧几里德行动通过添加拓扑不变量。我们还考虑了黎曼张量中立方的引力作用量的高曲率修正,并明确地构造了这种引力作用量的江口汉森型解。

英文摘要:

We construct higher-dimensional generalizations of the Eguchi-Hanson gravitational instanton in the presence of higher-curvature deformations of general relativity. These spaces are solutions to Einstein gravity supplemented with the dimensional extension of the quadratic Chern-Gauss-Bonnet invariant in arbitrary even dimension $D=2m\geq 4$, and they are constructed out of non-trivial fibrations over $(2m-2)$-dimensional Kähler-Einstein manifolds. Different aspects of these solutions are analyzed; among them, the regularization of the on-shell Euclidean action by means of the addition of topological invariants. We also consider higher-curvature corrections to the gravity action that are cubic in the Riemann tensor and explicitly construct Eguchi-Hanson type solutions for such.

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