报告题目:Gravitational Perturbation with its Applications to Quasi-Normal Mode and Lagrangian Analysis

报告人：张超

报告时间：2025年1月8日(周三)上午 10:00-12:00

报告地点：浙江工业大学理学楼 A109

摘要(Abstract)：Since 2015,people have confirmed more than 100 gravitational wave(GW)events. The GW signals from the so-called ringdown stage can be characterized by a set of complex frequencies, i.e.,the quasi-normal modes(QNMs), as noticed from the perturbation theory. However, the sophisticated structure of the Lagrangian of a certain gravity theory can keep us from extracting the desired QNM information from it when executing the gravitational perturbation. This talk will introduce a systematic Lagrangian analysis in dealing with this problem. Through this way,one can not only obtain the stability information of a theory but also a reduced Lagrangian serving for the QNM calculations.

报告人简介(Bio)：张超，本科毕业于北京航空航天大学物理系，博士毕业于美国贝勒大学(Baylor University)，曾在浙江工业大学和本东京理科大学(Tokyo University of Science)从事博士后研究，现就职于中国石油大学(北京)。主要研究黑洞、引力波、修改力理论，包括引力波波形计算、黑洞微扰问题、修改理论的参数限制等，近5年来的相关研究成果在PRD、JCAP、EPJC、CPC等杂志上发表。

邀请人：朱涛