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A<sc>bstract</sc> It was recently shown that (near-)extremal Kerr black holes are sensitive probes of small higher-derivative corrections to general relativity. In particular, these corrections produce diverging tidal forces on the horizon in the extremal limit. We show that adding a black hole charge makes this effect qualitatively stronger. Higher-derivative corrections to the Kerr-Newman solution produce tidal forces that scale inversely in the black hole temperature. We find that, unlike the Kerr case, for realistic values of the black hole charge large tidal forces can arise before quantum corrections due to the Schwarzian mode become important, so that the near-horizon behavior of the black hole is dictated by higher-derivative terms in the effective theory.
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This content will become publicly available on January 24, 2026
Electromagnetic–gravitational perturbations of Kerr–Newman black hole
Black holes are important objects in our understanding of the universe, as they represent the extreme nature of General Relativity. The Kerr–Newman black hole is the most general asymptotically flat black hole solution and its stability properties have long been elusive due to the interaction between gravitational and electromagnetic radiations. We illustrate the main conjectures regarding the stability problem of known black hole solutions and present some recent theorems regarding the evolution of the Kerr–Newman black holes to coupled perturbations.
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- PAR ID:
- 10599933
- Publisher / Repository:
- World Scientific Publishing Co Pte Ltd
- Date Published:
- Journal Name:
- International Journal of Modern Physics D
- ISSN:
- 0218-2718
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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