报告人：高显教授（中山大学）

题目：宇称破缺引力理论中的标量诱导引力波 Scalar-induced gravitational waves in parity-violating

gravity

时间：2026年6月12日（周五）10:00

地点：理工楼1226

邀请人：王永强、郭文帝

报告摘要：

标量诱导引力波是研究早期宇宙非线性扰动以及检验对广义相对论偏离的重要工具。在这个报告中，我们将讨论几类宇称破缺引力理论中的标量诱导引力波，包括Chern-Simons 引力、宇称破缺的 metric teleparallel 与 symmetric teleparallel 引力，以及宇称破缺标量-张量理论。我们将介绍宇称破缺项如何影响线性张量扰动的传播，并进一步改变标量扰动所诱导的引力波的源项。这些效应可导致引力波能谱相对于广义相对论的偏离，并产生可观测的圆偏振。相关能谱与偏振信号可为未来引力波观测检验宇称破缺引力理论提供新的途径。

Scalar-induced gravitational waves provide a important probe of nonlinear cosmological perturbations and of possible departures from general relativity in the early Universe. In this talk, we will discuss scalar-induced gravitational waves in several classes of parity-violating gravity theories, including Chern-Simons gravity, parity-violating metric and symmetric teleparallel gravity, and parity-violating scalar-tensor theories. We will discuss how parity-violating terms modify tensor propagation and, more importantly, the second-order scalar-induced source terms of gravitational waves. These effects can generate deviations in the gravitational-wave energy spectrum from that in GR, as well as circular polarization that can be observed. The resulting spectral and polarization signatures provide a new approach to distinguish parity-violating gravity from GR with future gravitational-wave observations.

报告人简介：

高显，中山大学物理学院教授，博士生导师。2010年博士毕业于中国科学院理论物理研究所，先后在法国巴黎第七大学、日本东京工业大学和东京大学从事博士后研究，2016年进入中山大学工作。主要研究方向为引力理论与宇宙学，包括修改引力理论及相关宇宙学模型，原初暴胀与宇宙学扰动、引力波，等等。在国内外学术刊物发表学术论文60余篇，出版教材1部。现任中国物理学会引力与相对论天体物理分会第十二届委员会委员，广东省青年科学家协会第六届理事，《中国物理C》青年编委。

Xian Gao is a professor at the School of Physics, Sun Yat-sen University (SYSU). He obtained his Ph.D. from the Institute of Theoretical Physics, Chinese Academy of Sciences in 2010. He subsequently conducted postdoctoral research at Paris University 7, Tokyo Institute of Technology, and the University of Tokyo. He joined SYSU as faculty in 2016. Xian Gao’s research focuses on gravitational theory and cosmology, including modified gravity theories and related cosmological models, primordial inflation and perturbations, and gravitational waves. He has published over 60 academic papers with over 3000 citations and is the author of a textbook on classical mechanics. He currently serves as a committee member of the branch of Gravitation and Relativistic Astrophysics at the Chinese Physical Society, and a council member of the Guangdong Association of Young Scientists.