报告题目 (Title)：An Observable in Classical Pure AdS3 Gravity: the Twist along a Geodesic（一个在经典AdS3纯引力中的观测量：即沿测地线的扭转）

报告人 (Speaker)：吴洁强 副研究员（中国科学院理论物理研究所）

报告时间 (Time)：2024年1月9日(周二) 15:00-17:00

报告地点 (Place)：校本部 G313

邀请人 (Inviter)：张弘 副教授

主办部门：理学院物理系

摘要 (Abstract)：

In this work, we consider a little-studied observable in classical pure AdS3 gravity: the twist along a geodesic. The motivation is that the twist only supports on the geodesic and may be a candidate element in the center. We study the properties of the twist and get the following results. First, we get the system's evolution generated by the twist, which exhibits a relative shift along the geodesic. Second, we show that the twist commutes with the length of the same geodesic, which supports the proposal that the twist is a candidate element in the center.