学术报告题目：Quantum uncertainty relations and quantum measure

报告人：李陶，博士

时间：9月26日上午10:00-12:00

地点：南教118

摘要：Entropic uncertainty relations is an important supplement to the uncertainty principle, which is indispensable in the theoretical research. Furthermore, its application value is highlighted with the realization of quantum cryptographic protocols. The optimization of the entropic uncertainty relations has profound significance in both theory and practical application.

This project is devoted to studying optimize entropic uncertainty relations on pair observations and multiple observations. In the optimization process, how to give a better lower bound structure is the key point of the related work. In this project, we take the method of majorization to deal with such difficult. Our paper show that the majorization can effectively optimize the lower bound of the entropic uncertainty relations. We improve our method called “joint probability distribution diagram” to analyze the majorization bound, and give a better structure of the lower bound of the entropic uncertainty relations under pair observations. Furthermore, this method is applied to the optimization of the lower bound of the entropic uncertainty relations under the condition of multiple observations. The probability is introduced to solve the difficulties encountered in the generalization, and the optimal degree of the upper bound of the criterion is given uncertainty relations. We improve our method called “joint probability distribution diagram”to analyze the majorization bound, and give a better structure of the lower bound of the entropic uncertainty relations under pair observations. Furthermore, this method is applied to the optimization of the lower bound of the entropic uncertainty relations under the condition of multiple observations. The probability is introduced to solve the difficulties encountered in the generalization, and the optimal degree of the upper bound of the criterion is given.

报告人简介：李陶，博士，北京工商大学，理学院

主要研究方向 量子信息与量子计算

近年发表的主要论文

1、Li T, Ma T, Wang Y, et al. Super Quantum Discord for X-type States[J]. International Journal of Theoretical Physics, 2015, 54(2):680-688.

2、Chen B, Li T, Fei S M. General SIC measurement-based entanglement detection[J]. Quantum Information Processing, 2015, 14(6):2281-2290

3、肖运龙, 李陶, 费少明, et al. Geometric global quantum discord of two-qubit states[J]. Chinese Physics B, 2016, 25(3):60-64.

4、Xiao Y, Jing N, Fei S M, et al. Strong entropic uncertainty relations for multiple measurements[J]. 2016, 93(4).

5、Li T, Xiao Y, Ma T, et al. Optimal Universal Uncertainty Relations.[J]. Scientific Reports, 2016, 6:35735.

理学院

2017-09-25