Comparison of definitions of angular momentum at null infinity
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arXiv
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| Main Authors: | , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866910827572887552 |
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| author | Bagiński, Szymon Jezierski, Jacek |
| author_facet | Bagiński, Szymon Jezierski, Jacek |
| contents | The supertranslation ambiguity of angular momentum at null infinity creates a technical difficulty in choosing the proper definition for this conserved quantity. As a result, many different approaches are found in the literature. This article aims to review the most relevant of these notions and compare their most significant properties. A new definition of angular momentum at null infinity is also proposed, which is supertranslation invariant under certain assumptions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_10105 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Comparison of definitions of angular momentum at null infinity Bagiński, Szymon Jezierski, Jacek General Relativity and Quantum Cosmology The supertranslation ambiguity of angular momentum at null infinity creates a technical difficulty in choosing the proper definition for this conserved quantity. As a result, many different approaches are found in the literature. This article aims to review the most relevant of these notions and compare their most significant properties. A new definition of angular momentum at null infinity is also proposed, which is supertranslation invariant under certain assumptions. |
| title | Comparison of definitions of angular momentum at null infinity |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2502.10105 |