A note on black hole entropy and wormhole instabilities
Abstract We discuss recent approaches to the computation of black hole entropies through semiclassical estimates of appropriate state overlaps, saturated by Euclidean wormhole configurations. We notice that the relevant saddle-point manifolds may exhibit instabilities, thereby compromising the inter...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2025-08-01
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| Series: | Journal of High Energy Physics |
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| Online Access: | https://doi.org/10.1007/JHEP08(2025)103 |
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| author | J. L. F. Barbón E. Velasco-Aja |
| author_facet | J. L. F. Barbón E. Velasco-Aja |
| author_sort | J. L. F. Barbón |
| collection | DOAJ |
| description | Abstract We discuss recent approaches to the computation of black hole entropies through semiclassical estimates of appropriate state overlaps, saturated by Euclidean wormhole configurations. We notice that the relevant saddle-point manifolds may exhibit instabilities, thereby compromising the interpretation of the Euclidean path integral as a tool for computing positive-definite inner products. We show that a proper treatment using a microcanonical formulation effectively addresses the puzzles posed by these instabilities. |
| format | Article |
| id | doaj-art-ee382379e6fe435d9459aafbf58b00ac |
| institution | Kabale University |
| issn | 1029-8479 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj-art-ee382379e6fe435d9459aafbf58b00ac2025-08-20T03:45:40ZengSpringerOpenJournal of High Energy Physics1029-84792025-08-012025812310.1007/JHEP08(2025)103A note on black hole entropy and wormhole instabilitiesJ. L. F. Barbón0E. Velasco-Aja1Instituto de Física Teórica IFT-UAM/CSIC, Universidad Autónoma de MadridInstituto de Física Teórica IFT-UAM/CSIC, Universidad Autónoma de MadridAbstract We discuss recent approaches to the computation of black hole entropies through semiclassical estimates of appropriate state overlaps, saturated by Euclidean wormhole configurations. We notice that the relevant saddle-point manifolds may exhibit instabilities, thereby compromising the interpretation of the Euclidean path integral as a tool for computing positive-definite inner products. We show that a proper treatment using a microcanonical formulation effectively addresses the puzzles posed by these instabilities.https://doi.org/10.1007/JHEP08(2025)103AdS-CFT CorrespondenceBlack Holes in String Theory |
| spellingShingle | J. L. F. Barbón E. Velasco-Aja A note on black hole entropy and wormhole instabilities Journal of High Energy Physics AdS-CFT Correspondence Black Holes in String Theory |
| title | A note on black hole entropy and wormhole instabilities |
| title_full | A note on black hole entropy and wormhole instabilities |
| title_fullStr | A note on black hole entropy and wormhole instabilities |
| title_full_unstemmed | A note on black hole entropy and wormhole instabilities |
| title_short | A note on black hole entropy and wormhole instabilities |
| title_sort | note on black hole entropy and wormhole instabilities |
| topic | AdS-CFT Correspondence Black Holes in String Theory |
| url | https://doi.org/10.1007/JHEP08(2025)103 |
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