Non-Hermitian Gravitational Physics

量子物理学・ナノサイエンス第124回特別セミナー

概要

Gravitational waves emitted by perturbed black holes provide a macroscopic realization of non-Hermitian wave dynamics: they either fall irreversibly into the event horizon or escape to infinity. This two-sided open boundary condition discretizes characteristic damped oscillations known as quasinormal modes, which appear as the ``ringdown'' phase in the gravitational waves observed from binary black-hole mergers. Despite this natural setup, the connection between non-Hermitian physics and black-hole gravitational waves has only recently come into focus. In this talk, I will give an overview of black-hole physics from the viewpoint of non-Hermitian wave dynamics, highlighting recent findings involving eigenvalue avoided crossings and resonantly amplified mode excitation near exceptional points: an effect that resolves a thirty-year mystery in gravitational-wave physics [1].

　　　　 　　　　
• [1] H. Motohashi, Phys. Rev. Lett. 134, 141401 (2025), [arXiv:2407.15191].
　　　　

• 量子物理学・ナノサイエンス第124回特別セミナー

• 東京科学大学理学院・物理学系 ナノサイエンスを拓く量子物理学拠点　共催