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arXiv 1107.0763gr-qc
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一个新的AF引力瞬子

A new AF gravitational instanton

Yu Chen, Edward Teo

摘要:

长期以来,人们一直认为欧几里得史瓦西和欧几里得克尔瞬子是唯一的非平凡渐近平坦(AF)引力瞬子。在这封信中,我们证明了这个猜想是错误的,通过明确地构造一个新的双参数AF引力瞬子与U(1)xU(1)等距群,使用逆散射方法。它的欧拉数χ=3,Hirzebruch签名τ=1,它的全局拓扑是CP ^2,适当地去掉了一个圆S ^1。这种引力瞬子的各种其他性质也进行了讨论。

英文摘要:

It has long been conjectured that the Euclidean Schwarzschild and Euclidean Kerr instantons are the only non-trivial asymptotically flat (AF) gravitational instantons. In this letter, we show that this conjecture is false by explicitly constructing a new two-parameter AF gravitational instanton with a U(1)xU(1) isometry group, using the inverse-scattering method. It has Euler number χ=3 and Hirzebruch signature τ=1, and its global topology is CP^2 with a circle S^1 removed appropriately. Various other properties of this gravitational instanton are also discussed.

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