活动名称：Non-Hermitian Structures in Black Hole Quasinormal Spectra

时间：2026年9月20日（星期日）时间点16:00

地点：博雅楼 503

主讲人：王鹏

主办单位：重庆师范大学物理与光电工程学院

主讲人简介：王鹏，四川大学教授、博士生导师。本科毕业于北京大学，于美国加州理工学院获得博士学位。主要研究领域为引力理论和弦理论，目前研究兴趣主要集中于黑洞物理、数值相对论、弦理论低能有效理论及规范/引力对偶等。

活动简介：This talk discusses non-Hermitian structures in black-hole quasinormal-mode spectra and their implications for black hole spectroscopy. Using hairy black holes in Einstein-Maxwell-scalar theory as a physical setting, we show that spectrally stable and unstable QNM families can coexist, while early-time ringdowns are mainly governed by the more spectrally stable modes. We then identify an exceptional point at which two QNM branches coalesce, and show that the corresponding waveform is more naturally described by an EP ansatz containing a resonant term linear in time. These results clarify how non-Hermitian spectral phenomena appear in both frequency-domain spectra and time-domain ringdown modeling.