标题： 角动量和广义相对论中的超平移 显示英文标题

标题： Angular momentum and supertranslation in general relativity

摘要： 如何测量双黑洞合并过程中引力辐射带走的角动量？ 由于“超平移歧义”的发现，自20世纪60年代以来，这一直是一个微妙的问题：同一系统的两个远距离观察者记录的角动量可能不同。 在本次演讲中，我将描述准局部质量理论和最佳等距嵌入如何确定一种不受任何超平移歧义影响的新角动量定义。 这是与陈柏宁、乔丹·凯勒、叶家凯和丘成桐的联合研究成果。 显示英文摘要

摘要： How does one measure the angular momentum carried away by gravitational radiation during the merger of a binary black hole? This has been a subtle issue since the 1960's due to the discovery of ``supertranslation ambiguity": the angular momentum recorded by two distant observers of the same system may not be the same. In this talk, I shall describe how the theory of quasilocal mass and optimal isometric embedding identifies a new definition of angular momentum that is free of any supertranslation ambiguity. This is based on joint work with Po-Ning Chen, Jordan Keller, Ye-Kai Wang, and Shing-Tung Yau.