Center-of-mass ambiguity for Bondi-Metzner-Sachs charges
| Autor: | Adam D. Helfer |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Physics
Angular momentum Physics and Astronomy (miscellaneous) 010308 nuclear & particles physics General relativity media_common.quotation_subject FOS: Physical sciences Context (language use) General Relativity and Quantum Cosmology (gr-qc) Ambiguity Invariant (physics) 01 natural sciences Center of mass (relativistic) General Relativity and Quantum Cosmology Theoretical physics 0103 physical sciences 010306 general physics Spin-½ media_common |
| ISSN: | 1361-6382 |
| Popis: | Dray and Streubel proposed a definition of angular momentum in general relativity based on `Bondi-Metzner-Sachs (BMS) charges'. I show here that the natural definition of center of mass in this program has an infinite-dimensional ambiguity. (This seems not to have been noticed before because previous work has tacitly carried over a special-relativistic assumption.) A related point is that the natural definition of spin in this context is translation-, but not supertranslation-, invariant. 7 pages. This is the Accepted Manuscript version of an article accepted for publication in Classical and Quantum Gravity. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at 10.1088/1361-6382/abfc2e |
| Databáze: | OpenAIRE |
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