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arXiv 2301.08032gr-qchep-th
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角动量与记忆效应

Angular momentum and memory effect

Tianjin University(天津大学);Institute of Mathematics, Academy of Mathematics and Systems Science and Hua Loo-Keng Key Laboratory, Chinese Academy of Sciences(中国科学院数学与系统科学研究院、华罗庚数学重点实验室);Peng Huanwu Center for Fundamental Theory(彭桓武基础理论中心);School of Mathematical Sciences, University of Chinese Academy of Sciences(中国科学院大学数学科学学院)

Pujian Mao, Jun-Bao Wu, Xiaoning Wu

AI总结:

本文通过消除引力波记忆效应,提出在无穷远处定义角动量的新方法,解决了孤立系统角动量的超平移不确定性问题。

摘要:

在广义相对论中,孤立系统的角动量概念长期存在超平移不确定性问题。本文论证这种不确定性本质上源于引力波记忆效应。当适当减去观察者的记忆效应后,可以在无穷远处引入一个超平移不变的角动量定义。

英文摘要:

It is a long-standing problem in general relativity that the notion of angular momentum of an isolated system has supertranslation ambiguity. In this paper, we argue that the ambiguity is essentially because of the gravitational wave memory. When properly subtracting the memory effect of the observer, one can introduce a supertranslation invariant definition of the angular momentum at null infinity.

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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