Cut-continuity of twistor angular momentum

نویسندگان

چکیده

Chen et al. argued recently that, in Bondi-Sachs space-times, the angular momentum at scri (null infinity) should vary continuously with position of cut (but not depend sensitively on its derivatives); they showed that this property was enjoyed by some definitions but others. I show here twistor definition has continuity. The argument is rather different from al.'s, invariant geometry forefront. flux, sense emitted between two infinitesimally separated cuts, calculated; flux can be interpreted as first variation respect to cut. Examining second variation, one finds definition, unlike most others, responds correlations radiation asymptotic directions. thus sensitive qualitatively structure field than are currently more used ones.

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ژورنال

عنوان ژورنال: Physical review

سال: 2022

ISSN: ['0556-2813', '1538-4497', '1089-490X']

DOI: https://doi.org/10.1103/physrevd.106.084044