报告题目：Barrier from chaos: operator entanglement dynamics from reduced density matrices
报告人：王华嘉 博士
报告人单位：加州大学圣塔芭芭拉分校
报告时间：2019年12月9日，下午14：00-15：00
报告地点：四牌楼校区逸夫建筑馆1502
报告邀请人：文强副教授（wenqiang@seu.edu.cn）
报告摘要：The dynamics of entanglement growth after global quench has been very useful in probing universal features in systems ranging integrable models to chaotic systems such as AdS/CFT. In this talk, we explore such dynamics in a new context: operator entanglement from the reduced density matrices. We study the quenched dynamics of operator entanglement in three classes of systems: rational CFTs in 2d, random unitary circuits, and holographic CFTs, representing systems of different levels of quantum chaoticity. We find a common intermediate plateau regime of extensive operator entanglement in these models, whose persistence we propose as a new measure of quantum chaoticity. We also discuss the results in the context of plausibility of effectively simulating thermalization using matrix-product-state ansatz.
报告人介绍：
王华嘉博士2009年本科毕业于华盛顿大学圣路易斯封校，2015年博士毕业于斯坦福大学，之后在UIUC，UCSB等著名高校从事博士后研究，2020年将加入中国科学院大学Kavli理论物理研究所。王华嘉博士的研究领域横跨凝聚态理论和高能理论物理，在全息理论，量子纠缠，量子引力，以及非费米液体等方向都做出了重要的工作。