报告题目：Discord and Distortion
报 告 人：张伟伟 博士后研究员
工作单位：德国马克斯普朗克光科学研究所
报告时间：2020-10-30 16:00-17:00
腾讯会议ID： 477 900 783 会议密码：201030
报告摘要：
Discord, originally notable as a signature of bipartite quantum correlation, in fact can be nonzero classically, i.e., arising from noisy measurements by one of the two parties. We show that classical discord is equivalent to (doubly stochastic) channel distortion by numerically discovering a monotonic relation between discord and total-variation distance for a bipartite protocol with one party having a noiseless channel and the other party having a noisy channel. Our numerical method includes randomly generating doubly stochastic matrices for noisy channels and averaging over a uniform measure of input messages. Connecting discord with distortion cements discord as a signature of classical, not quantum, correlation, and thus challenges the common view that discord is a quantum signature even if entanglement is not present.
报告人简介：
张伟伟，德国马克斯普朗克光科学研究所博士后研究员，主要从事量子信息以及基于量子动力学对量子拓扑材料的模拟，进行量子猫态，拓扑纠缠态的制备。她先后在中国科学技术大学，悉尼大学从事研究工作。她在Physical Review Letter, NPj Computaional matreials, New Journal Physics, Physical Review A等期刊已发表SCI学术论文24篇。
