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| Format: | Preprint |
| Publié: |
2025
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| Accès en ligne: | https://arxiv.org/abs/2509.04293 |
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| _version_ | 1866909832043298816 |
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| author | Kraus, Per |
| author_facet | Kraus, Per |
| contents | We investigate radiation from near-extremal black holes formed by collapse, focusing on the role of large backreaction effects arising from gravitational fluctuations in the near-horizon region. Such effects have previously been identified from computations based on JT gravity and its Schwarzian description, most notably for the Euclidean partition function. Restricting attention to the s-wave sector, we integrate out gravity by solving the constraint equations in the Hamiltonian formalism, obtaining an effective scalar action with a coupling that grows at low temperature, thus enabling a real-time treatment of quantum backreaction. We then take initial steps toward evaluating the impact of this interaction on correlations of the outgoing radiation, and compare our findings with earlier results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_04293 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Hamiltonian approach to near-extremal black hole evaporation and backreaction Kraus, Per High Energy Physics - Theory We investigate radiation from near-extremal black holes formed by collapse, focusing on the role of large backreaction effects arising from gravitational fluctuations in the near-horizon region. Such effects have previously been identified from computations based on JT gravity and its Schwarzian description, most notably for the Euclidean partition function. Restricting attention to the s-wave sector, we integrate out gravity by solving the constraint equations in the Hamiltonian formalism, obtaining an effective scalar action with a coupling that grows at low temperature, thus enabling a real-time treatment of quantum backreaction. We then take initial steps toward evaluating the impact of this interaction on correlations of the outgoing radiation, and compare our findings with earlier results. |
| title | Hamiltonian approach to near-extremal black hole evaporation and backreaction |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2509.04293 |