Radiation in Holography
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arXiv
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866914830410055680 |
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| author | Ciambelli, Luca Pasterski, Sabrina Tabor, Elisa |
| author_facet | Ciambelli, Luca Pasterski, Sabrina Tabor, Elisa |
| contents | We show how to encode the radiative degrees of freedom in $4$-dimensional asymptotically AdS spacetimes, using the boundary Cotton and stress tensors. Background radiation leads to a reduction of the asymptotic symmetry group, in contrast to asymptotically flat spacetimes, where a non-vanishing news tensor does not restrict the asymptotic symmetries. Null gauges, such as $Λ$-BMS, provide a framework for AdS spacetimes that include radiation in the flat limit. We use this to check that the flat limit of the radiative data matches the expected definition in intrinsically asymptotically flat spacetimes. We further dimensionally reduce our construction to the celestial sphere, and show how the $2$-dimensional celestial currents can be extracted from the $3$-dimensional boundary data. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2404_02146 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Radiation in Holography Ciambelli, Luca Pasterski, Sabrina Tabor, Elisa High Energy Physics - Theory General Relativity and Quantum Cosmology We show how to encode the radiative degrees of freedom in $4$-dimensional asymptotically AdS spacetimes, using the boundary Cotton and stress tensors. Background radiation leads to a reduction of the asymptotic symmetry group, in contrast to asymptotically flat spacetimes, where a non-vanishing news tensor does not restrict the asymptotic symmetries. Null gauges, such as $Λ$-BMS, provide a framework for AdS spacetimes that include radiation in the flat limit. We use this to check that the flat limit of the radiative data matches the expected definition in intrinsically asymptotically flat spacetimes. We further dimensionally reduce our construction to the celestial sphere, and show how the $2$-dimensional celestial currents can be extracted from the $3$-dimensional boundary data. |
| title | Radiation in Holography |
| topic | High Energy Physics - Theory General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2404.02146 |