A Note on Black Hole Entropy and Wormhole Instabilities
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915149007290368 |
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| author | Barbon, J. L. F. Velasco-Aja, E. |
| author_facet | Barbon, J. L. F. Velasco-Aja, E. |
| contents | 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 | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_00769 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A Note on Black Hole Entropy and Wormhole Instabilities Barbon, J. L. F. Velasco-Aja, E. High Energy Physics - Theory 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. |
| title | A Note on Black Hole Entropy and Wormhole Instabilities |
| topic | High Energy Physics - Theory |
| url | https://arxiv.org/abs/2502.00769 |