报告题目：Nonclassicality of Light

报告日期：2021/04/20 时间：10:30-11:30

报告地点：腾讯会议（线上）ID：607 532 213

Abstract: Identifying the classical-quantum divide and quantifying nonclassicality are fundamental issues in quantum exploration. By use of the Wigner-Yanase skew information [Proc. Nat. Acad. Sci. USA, 49, 910 (1963)], which synthesizes the noncommutativity between quantum states and observables, we introduce a simple yet effective measure of nonclassicality for any bosonic field state. This is achieved by considering measurement of the non-Hermitian annihilation operator from an information-theoretic perspective. This measure, apart from capturing the idea of nonclassicality as quantum uncertainty in a succinct way, is mathematically computable and physically intuitive. We investigate its fundamental properties, and illustrate its physical applications in quantifying nonclassicality of quantum states. We compare it with various existent measures of nonclassicality and illustrate its merits. A related measure of classicality, which is in some sense dual to nonclassicality, is also introduced. This pair of (classicality, nonclassicality) sheds novel insights into the classical-quantum interplay.

报告人简介：骆顺龙，1989年毕业于上海交通大学，1995年获武汉大学博士学位，2001年任中国科学院数学与系统科学研究院研究员，博士生导师。现任中国科学院数学与系统科学研究院应用数学研究所所长，量子计算与量子信息处理研究中心主任,北京数学会副理事长。曾应邀在第八届国际工业与应用数学大会作一小时大会报告(2015)。主要从事概率统计﹑量子论和信息论研究,相关工作被引用6000余次(Google Scholar)。