The First International Congress of Basic Science (ICBS)

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Po-Ning Chen

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University of California, Riverside

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Date	Time	Local Time	Room	Session	Role	Topic
2023-07-24	16:15-17:00	2023-07-24,16:15-17:00	LR10 (A7 1F)	07-24 Afternoon Math Lecture Room 10 (A7 1F)	Speaker	Supertranslation invariance of angular momentum The notion of angular momentum in general relativity has been a subtle issue since the 1960’s, due to the discovery of ``supertranslation ambiguity”: the angular momentums recorded by two distant observers of the same system may not be the same. In this talk, we shall show how mathematical theory identifies a correction term and leads to a new definition of angular momentum that is free of any supertranslation ambiguity.