Quantum fermion superradiance and vacuum ambiguities on charged black holes
Abstract Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present. We construct a vacuum state for the fermion field which...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-05-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP05(2025)118 |
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| author | Álvaro Álvarez-Domínguez Elizabeth Winstanley |
| author_facet | Álvaro Álvarez-Domínguez Elizabeth Winstanley |
| author_sort | Álvaro Álvarez-Domínguez |
| collection | DOAJ |
| description | Abstract Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present. We construct a vacuum state for the fermion field which has no incoming particles from past null infinity, but which contains, at future null infinity, a nonthermal flux of particles. This state describes both the discharge and energy loss of the black hole, and we analyze how the interpretation of this phenomenon depends on the ambiguities inherent in defining the quantum vacuum. |
| format | Article |
| id | doaj-art-5f8b658efd4f440b93a1ee8fd7e93e4a |
| institution | OA Journals |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-5f8b658efd4f440b93a1ee8fd7e93e4a2025-08-20T02:30:49ZengSpringerOpenJournal of High Energy Physics1029-84792025-05-012025512210.1007/JHEP05(2025)118Quantum fermion superradiance and vacuum ambiguities on charged black holesÁlvaro Álvarez-Domínguez0Elizabeth Winstanley1Departamento de Física Teórica and IPARCOS, Universidad Complutense de MadridSchool of Mathematical and Physical Sciences, The University of SheffieldAbstract Unlike a classical charged bosonic field, a classical charged fermion field on a static charged black hole does not exhibit superradiant scattering. We demonstrate that the quantum analogue of this classical process is however present. We construct a vacuum state for the fermion field which has no incoming particles from past null infinity, but which contains, at future null infinity, a nonthermal flux of particles. This state describes both the discharge and energy loss of the black hole, and we analyze how the interpretation of this phenomenon depends on the ambiguities inherent in defining the quantum vacuum.https://doi.org/10.1007/JHEP05(2025)118Black HolesNonperturbative Effects |
| spellingShingle | Álvaro Álvarez-Domínguez Elizabeth Winstanley Quantum fermion superradiance and vacuum ambiguities on charged black holes Journal of High Energy Physics Black Holes Nonperturbative Effects |
| title | Quantum fermion superradiance and vacuum ambiguities on charged black holes |
| title_full | Quantum fermion superradiance and vacuum ambiguities on charged black holes |
| title_fullStr | Quantum fermion superradiance and vacuum ambiguities on charged black holes |
| title_full_unstemmed | Quantum fermion superradiance and vacuum ambiguities on charged black holes |
| title_short | Quantum fermion superradiance and vacuum ambiguities on charged black holes |
| title_sort | quantum fermion superradiance and vacuum ambiguities on charged black holes |
| topic | Black Holes Nonperturbative Effects |
| url | https://doi.org/10.1007/JHEP05(2025)118 |
| work_keys_str_mv | AT alvaroalvarezdominguez quantumfermionsuperradianceandvacuumambiguitiesonchargedblackholes AT elizabethwinstanley quantumfermionsuperradianceandvacuumambiguitiesonchargedblackholes |