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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:21040008  ( MP4 Medium Res , MP3 , PDF ) Which Format?
Supertranslation invariance of angular momentum
Speaker(s): Po-Ning Chen
Abstract:

LIGO's successful detection of gravitational waves has revitalized the theoretical understanding of the angular momentum carried away by gravitational radiation. An infinite-dimensional supertranslation ambiguity has presented an essential difficulty for decades of study. Recent advances were made to quantify the supertranslation ambiguity in the context of binary coalescence. In this talk, we will present the first definition of angular momentum in general relativity that is completely free from supertranslation ambiguity. The new definition of angular momentum is derived from the limit of the quasilocal angular momentum we defined previously.

Date: 01/04/2021 - 1:00 pm
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