
报告题目:Toward a worldsheet theory of entanglement entropy
报告人:伍厚文 副研究员(四川大学)
报告时间:2026 年 5 月 8 日(周五)10 : 00-11 : 00
报告地点:北洋园校区 49 教 410 室
报告摘要:
We propose a new action for entanglement entropy in the framework of the AdS 3 / CFT 2 correspondence. This action is constructed directly from the entanglement entropy of the CFT 2 , and we show that the Einstein equations of AdS 3 gravity can be derived from it. In the near-coincidence limit, using Riemann normal coordinates, the action reduces to a string world-sheet action in a curved background that naturally includes the symmetric spacetime metric, an antisymmetric Kalb-Ramond field, and a dilaton. The Kalb-Ramond field gives rise to a string charge density, from which we demonstrate that bit threads can be exactly reproduced. This correspondence provides a clear physical interpretation of bit threads. Exploiting this correspondence, we establish explicit relations between the emergent string world sheet and the Ryu-Takayanagi (RT) surface, providing new insights into entanglement entropy. In particular, entanglement entropy can be computed from open string charge, while Bekenstein-Hawking entropy arises from closed string charge through open-closed string duality.
报告人简介:
伍厚文,四川大学物理学院副研究员。2018年博士毕业于四川大学物理学院,2018年-2019年在四川大学物理学院从事博士后研究工作,2019年起任副研究员。此外于2016年-2017年在美国哈佛大学物理系担任Visiting Fellow,于2021年-2023年在英国剑桥大学应用数学及理论物理学系从事博士后研究。目前主要研究方向为离壳弦理论,及通过弦理论解决黑洞信息悖论。