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【讲座题目】高斯噪声信道

【主 讲 人】骆顺龙 研究员

中国科学院数学与系统科学研究院

【讲座时间】2022.4.18周一下午1点30-2点30

【腾讯会议】ID:280-605-036

【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。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。

【讲座内容简介】Gaussian noise channels (also called classical noise channels, bosonic Gaussian channels) arise naturally in continuous variable quantum information and play an important role in both theoretical analysis and experimental investigation of information transmission. After reviewing concisely the basic properties of these channels, we introduce an information-theoretic measure for the decoherence of optical states caused by these channels in terms of averaged Wigner-Yanase skew information, explore its basic features, obtain a scaling law, and derive a complementarity relation between the decoherence and the quantum affinity. As an application of the decoherence measure, we derive a convenient and sufficient criterion for detecting optical nonclassicality. The decoherence on some typical optical states caused by Gaussian noise channels are explicitly evaluated to illustrate the concept.