报告题目：Gravitational Wave Propagation in Black Hole Spacetime

报告人：何建华  教授（南京大学）

报告时间：2026 年 5 月 19 日（周二）15 : 30-16 : 30

报告地点：北洋园校区 49 教 410 室

报告摘要：

Understanding wave propagation within black hole spacetimes remains a long-standing challenge in general relativity. In contrast to flat Minkowski space, the breakdown of Huygens’ principle in curved geometries means that finite wave packets do not maintain sharp trailing wavefronts; instead, they develop persistent, continuously decaying 'tails.' Furthermore, these perturbations may excite the black hole’s characteristic quasi-normal modes (QNMs). Wave propagation within a black hole is thus a complex superposition of three distinct phenomena: trajectory bending, QNM excitation, and late-time tail formation—an interplay further complicated by the intricate 3D spatial geometry of black hole systems. Despite their importance, these issues remain less addressed in the literature. In this talk, I will present our recent progress in this topic. I will describe the numerical techniques developed to simulate these effects within a Schwarzschild black hole and highlight the unique signatures imprinted on gravitational waveforms as they interact with a black hole. Finally, I will discuss the potential detectability of these phenomena in Advanced LIGO (aLIGO) and their implication for black hole physics and astrophysics.

报告人简介：

        何建华，南京大学天文与空间科学学院教授。2006年获上海交通大学物理学学士学位。2011年获复旦大学理论物理博士学位。2011-2015年在意大利国家天文台从事博士后研究工作。2015-2018年获英国杜伦大学International Junior Research Fellowship，在杜伦大学计算宇宙学中心(ICC,Durham)从事研究工作。2018年12入职南京大学天文与空间科学学院。主要从事引力宇宙学相关研究。具体包括：修正引力理论、宇宙微波背景辐射、宇宙大尺度结构形成数值模拟，以及星系巡天宇宙大尺度结构实验观测。近年来，主要从事实验室暗能量检验以及引力波相关研究。截止目前发表论文40余篇，其中以第一/通讯作者发表1篇Nature Physics, 2篇Nature Astronomy，3篇Phys.Rev.Lett.。长期担任PRL，PRD，MNRAS，JCAP等国际期刊审稿人。