Chaotic Dynamics in Extremal Black Holes: A Challenge to the Chaos Bound
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866917280726646784 |
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| author | Dalui, Surojit Singha, Chiranjeeb Bhattacharya, Krishnakanta |
| author_facet | Dalui, Surojit Singha, Chiranjeeb Bhattacharya, Krishnakanta |
| contents | We investigate chaotic dynamics in extremal black holes by analyzing the motion of massless particles in both Reissner-Nordström and Kerr geometries. Two complementary approaches (i) taking the extremal limit of non-extremal solutions and (ii) working directly in the extremal background, yield consistent results. We find that, contrary to naive extrapolation of the Maldacena-Shenker-Stanford (MSS) chaos bound, the Lyapunov exponent remains positive even at zero temperature. For Reissner-Nordström black holes, chaos diminishes but persists at extremality, while for Kerr black holes it strengthens with increasing spin. These results demonstrate that extremal black holes exhibit residual chaotic dynamics that violate the MSS bound, establishing them as qualitatively distinct dynamical phases of gravity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_04423 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Chaotic Dynamics in Extremal Black Holes: A Challenge to the Chaos Bound Dalui, Surojit Singha, Chiranjeeb Bhattacharya, Krishnakanta General Relativity and Quantum Cosmology High Energy Physics - Theory Chaotic Dynamics We investigate chaotic dynamics in extremal black holes by analyzing the motion of massless particles in both Reissner-Nordström and Kerr geometries. Two complementary approaches (i) taking the extremal limit of non-extremal solutions and (ii) working directly in the extremal background, yield consistent results. We find that, contrary to naive extrapolation of the Maldacena-Shenker-Stanford (MSS) chaos bound, the Lyapunov exponent remains positive even at zero temperature. For Reissner-Nordström black holes, chaos diminishes but persists at extremality, while for Kerr black holes it strengthens with increasing spin. These results demonstrate that extremal black holes exhibit residual chaotic dynamics that violate the MSS bound, establishing them as qualitatively distinct dynamical phases of gravity. |
| title | Chaotic Dynamics in Extremal Black Holes: A Challenge to the Chaos Bound |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory Chaotic Dynamics |
| url | https://arxiv.org/abs/2602.04423 |