Nonclassical light states are important for both conceptual and practical reasons: they are basic ingredients in testing and exploring quantum foundations, and are crucial resources in quantum technologies. Various useful criteria have been developed to detect nonclassicality in the literature, and several meaningful measures of nonclassicality have been introduced and measured experimentally. In this talk, by use of a non-Hermitian generalization of the Wigner-Yanase-Dyson skew information and playing with operator ordering in evaluating average photon number, we develop a novel family of criteria for detecting nonclassicality of light based on Lieb’s concavity, which is a deep and powerful result concerning interaction between quantum states and observables. We elucidate the information-theoretic as well as the physical meaning of the criteria, and illustrate their effectiveness in capturing and quantifying nonclassicality of various important light states.

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。曾应邀在四年一度的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)。

腾讯会议 ID：802 5064 3987 （没有密码）

腾讯会议链接：https://meeting.tencent.com/s/UDOErHt9z0GE

组织者：刘正伟