理学院专题学术讲座 | Shenglong Xu:Quantum Information Dynamics in Many-Body Systems

来源:理学院 发布时间:2019-12-19 作者:理学院

时间20191223日(周一)上午10:00-11:30

Time10:00-11:30 AM, Monday, December 23, 2019

地点:西湖大学云栖校区4号楼311会议室

Venue: Room 311, Building 4, Yunqi Campus, Westlake University

主持人: 西湖大学理学院 李牮 博士

Host: Dr. Jian Li, PI of School of Science, Westlake University


主讲嘉宾/Speaker

Dr. Shenglong Xu

University of Maryland, and Texas A&M

主讲人简介/Biography:

徐盛隆于20177月在美国加州圣地亚哥分校取得物理学博士学位,师从吴从军教授。研究工作凝聚态体系中的动力学问题和强关联效应,例如洪特金属的热力学行为,时空对称性对于量子动力学的影响。他毕业之后在美国马里兰大学理论凝聚态中心从事博后研究工作,主要研究工作为凝聚态和量子信息的交叉方向,包括量子随机电路,量子置乱,量子热化,多体局域化等。至今在包括Nature Physics, Physics Review X Physics Review Letter 等期刊中发表多篇论文。


讲座摘要/Abstract:

In this talk, I will discuss new perspectives on many-body dynamics based on quantum information. Under unitary time evolution, information about a single spin gradually spreads out in space, and an effective light cone naturally emerges as an intrinsic property of the time evolution operator. Based on this picture, I will present a low-cost tensor network method that can accurately capture the shape of the causal light cone for generic 1D systems of hundreds of spins, a regime that was previously beyond reach. Using the method, we identify a new dynamical phase, characterized by a power-law-like causal light cone. Signatures of this new phase have already been observed in recent ultracold atom experiments on interacting quasi-periodic systems.


讲座联系人/Contact: 理学院 雷老师 Leirong@westlake.edu.cn