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arXiv 2406.07604hep-thgr-qc
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柱面引力波的软零点

Soft zero for cylindrical gravitational waves

Robert Penna

AI总结:

本文证明柱面引力波 S 矩阵存在由渐近无穷远处 Geroch 对称性的 Ward 恒等式导致的软零点,而非普通引力子的软极点,因此不产生记忆效应。

摘要:

引力子 S 矩阵具有著名的软极点。我们证明柱面引力波的 S 矩阵具有一个软零点。普通引力子的软极点来自渐近无穷远处超平移对称性的 Ward 恒等式。我们证明柱面引力波的软零点来自渐近无穷远处 Geroch 对称性的 Ward 恒等式。由于它是零点而非极点,因此不存在记忆效应。总体而言,这一软零点是 Geroch 对称性以及柱面引力波异常简洁性的一种体现。

英文摘要:

The graviton S-matrix has a famous soft pole. We show that the S-matrix for cylindrical gravitational waves has a soft zero. The soft pole for ordinary gravitons comes from a Ward identity for supertranslation symmetry at asymptotic infinity. We show that the soft zero for cylindrical gravitational waves comes from a Ward identity for Geroch symmetry at asymptotic infinity. Because it is a zero rather than a pole, there is no memory effect. Overall, this soft zero is a manifestation of Geroch symmetry and of the extraordinary simplicity of cylindrical gravitational waves.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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