兰州理论物理中心学术报告——何松教授

日期: 2022-12-02 阅读: 来源: 关键词:

报告人:何松教授(吉林大学)

题目:Pseudo entanglement entropy in 2D CFTs

时间:2022年12月7号(周三)早上10:00

腾讯ID:189 308 705

邀请人:魏少文

报告摘要:

In this work, we study the real-time evolution of pseudo-(Rényi) entropy, a generalization of entanglement entropy, in two-dimensional conformal field theories (CFTs). We focus on states obtained by acting primary operators located at different space points or their linear combinations on the vacuum. We show the similarities and differences between the pseudo-(Rényi) entropy and entanglement entropy. For excitation by a single primary operator, we analyze the behaviors of the 2nd pseudo-Rényi entropy in various limits and find some symmetries associated with the subsystem and the positions of the inserted operators. For excitation by linear combinations, the late time limit of the nth pseudo-Rényi entropy shows a simple form related to the coefficients of the combinations and Rényi entropy of the operators, which can be derived by using the Schmidt decomposition. Further, we find two kinds of particular spatial configurations of insertion operators in one of which the pseudo-(Rényi) entropy remains real throughout the time evolution. Finally, we will investigate the reality condition of pseudo entropy and possible applications.

报告人简介:

何松,吉林大学教授,博士生导师。2011年中科院高能所理论物理博士,2011年-2019年先后在中科院理论物理研究所,日本京都大学汤川研究所,德国马普引力研究所(爱因斯坦研究所)从事博士后研究。2019年加入吉林大学物理学院。研究兴趣主要集中在弦理论、量子场论中的量子纠缠,以及规范引力对偶及其在量子色动力学和凝聚态物理中应用。

0
点赞
文:何洁
图:
视频:
编辑:王曈
责任编辑:彭倩