理论物理中心学术报告 / Seminar Talk at CTP-SCU

报告题目 / Title:  Quantum Dimension as Entanglement Entropy in 2D RCFTs with/without boundary

报告人 / Speaker:  日本京都大学基础物理学研究所 何松 博士后 / Song HE, Postdoc at Yukawa Institute for
Theoretical Physics, Kyoto University

时间 / Time:  2015年4月30日上午10点30分 / 10:30AM, 30 April 2015

地点 / Venue:  物理馆103室 / Physics Building room 103

摘要 / Abstract:

We study entanglement entropy of excited states in two dimensional conformal field theories (CFTs) with/without boundary.  Especially we consider excited states obtained by acting primary operators on a vacuum.  We show that under its time evolution, entanglement entropy increases by a finite constant when the causality condition is satisfied.  Moreover, in rational CFTs, we prove that this increased amount of (both Renyi and von-Neumann) entanglement entropy always coincides with the log of quantum dimension of the primary operator.