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arXiv · 2606.14834

Entropy Quantization and Quasi-normal Modes of Dyonic Kerr-Sen Black Holes

Muhammad Fitrah Alfian Rangga Sakti·Piyabut Burikham
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Abstract

We explore the properties of inner and outer horizon thermodynamics of dyonic Kerr-Sen black hole (DKSBH). It is observed that the entropy (or area) product is universal, depending only on the angular momentum of the BH. We then proceed to study the dual conformal field theory~(CFT) in the Kerr/CFT correspondence using thermodynamic relations and compute the central charges from 2D CFT. The central charges are found to be universal with only angular momentum dependence. By comparing to Kerr-Newman BH, it is found that the essential difference is in the right-moving sector of the CFT. Interestingly, we can then explicitly produce the non-vanishing central charges related to its static solution, the dyonic dilaton BH, using the thermodynamic method. Moreover, from the CFT relations to multi-horizon thermodynamics, we find the analytical expression of the quasi-normal modes~(QNM) spectra in terms of BH parameters. This QNM computation supports the Bekenstein-Hod conjecture on the BH's entropy quantization.

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Muhammad Fitrah Alfian Rangga Sakti, Piyabut Burikham. 2026-06-12. Entropy Quantization and Quasi-normal Modes of Dyonic Kerr-Sen Black Holes. https://arxiv.org/abs/2606.14834

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