Probing thermodynamic phase transitions by dynamics of timelike particle around a magnetic AdS black hole
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arXiv
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| Auteurs principaux: | , , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866914095046852608 |
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| author | Ali, R. H. Tang, Zi-Yu Kuang, Xiao-Mei |
| author_facet | Ali, R. H. Tang, Zi-Yu Kuang, Xiao-Mei |
| contents | In this paper, we investigate the phase structure of a nonminimal coupled magnetic AdS black hole by connecting its thermodynamic properties with the dynamical behavior of orbiting particles, within the framework of Lyapunov exponent and quasi-periodic oscillation. The analysis of the free energy as a function of the Hawking temperature reveals a Van der Waals-like phase transition, characterized by the coexistence of small, intermediate, and large black hole phases. By examining timelike geodesics corresponding to unstable circular orbits, we evaluate the Lyapunov exponent of the test particles crossing the phase transition and explore its role as dynamical indicator of stability. Furthermore, by perturbing the unstable circular orbit and employing the relativistic precession model, we explore the associated upper and lower quasi-periodic oscillation frequencies. Our findings show that the occurrence of thermodynamic phase transitions induces marked changes in both Lyapunov exponent and quasi-periodic oscillation spectra, indicating that these dynamical quantities can serve as sensitive probes of the underlying thermodynamic phase structure of the black hole. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_13552 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing thermodynamic phase transitions by dynamics of timelike particle around a magnetic AdS black hole Ali, R. H. Tang, Zi-Yu Kuang, Xiao-Mei General Relativity and Quantum Cosmology High Energy Physics - Theory In this paper, we investigate the phase structure of a nonminimal coupled magnetic AdS black hole by connecting its thermodynamic properties with the dynamical behavior of orbiting particles, within the framework of Lyapunov exponent and quasi-periodic oscillation. The analysis of the free energy as a function of the Hawking temperature reveals a Van der Waals-like phase transition, characterized by the coexistence of small, intermediate, and large black hole phases. By examining timelike geodesics corresponding to unstable circular orbits, we evaluate the Lyapunov exponent of the test particles crossing the phase transition and explore its role as dynamical indicator of stability. Furthermore, by perturbing the unstable circular orbit and employing the relativistic precession model, we explore the associated upper and lower quasi-periodic oscillation frequencies. Our findings show that the occurrence of thermodynamic phase transitions induces marked changes in both Lyapunov exponent and quasi-periodic oscillation spectra, indicating that these dynamical quantities can serve as sensitive probes of the underlying thermodynamic phase structure of the black hole. |
| title | Probing thermodynamic phase transitions by dynamics of timelike particle around a magnetic AdS black hole |
| topic | General Relativity and Quantum Cosmology High Energy Physics - Theory |
| url | https://arxiv.org/abs/2510.13552 |