PIRSA:21040008

Supertranslation invariance of angular momentum

Chen, P. (2021). Supertranslation invariance of angular momentum . Perimeter Institute. https://pirsa.org/21040008

Chen, Po-Ning. Supertranslation invariance of angular momentum . Perimeter Institute, Apr. 01, 2021, https://pirsa.org/21040008 

          @misc{ pirsa_PIRSA:21040008,
            doi = {10.48660/21040008},
            url = {https://pirsa.org/21040008},
            author = {Chen, Po-Ning},
            keywords = {Strong Gravity},
            language = {en},
            title = {Supertranslation invariance of angular momentum },
            publisher = {Perimeter Institute},
            year = {2021},
            month = {apr},
            note = {PIRSA:21040008 see, \url{https://pirsa.org}}
          }

Po-Ning Chen University of California, Riverside

DOI 10.48660/21040008
Collection
Talk Type Scientific Series
Subject

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.