报告题目：Characterizations of Bell nonlocality and EPR steering based on decompositions of row-stochastic matrices

报告人：陕西师范大学曹怀信教授

摘要：Bell nonlocality and Einstein-Podolsky-Rosen (EPR) steering are very important quantum correlations in composite quantum systems. Bell nonlocality of a bipartite state is observed in some local quantum measurements, while EPR steering was first observed by Schrödinger in the context of famous EPR paradox. In this talk, we discuss the Bell nonlocality and EPR steering of bipartite states, including  mathematical definitions and characterizations of these two quantum correlations, the convexity as well as the closedness of the sets of all Bell local states and all EPR unsteerable states, respectively. We also derive sufficient conditions for a state to be steerable; these conditions imply that Alice can steer Bob's state whenever Alice has two POV measurements such that the sets of Bob's normalized conditional states become two disjoint sets of pure states, or whenever she has one POV measurement such that Bob's normalized conditional states become a linearly independent set of pure states.

报告时间：2020年12月5日8:00-8:40

报告地点：腾讯会议：577 862 732

报告人简介：曹怀信，男，教授，博士，博士生导师，陕西省高等学校教学名师。主要从事算子论与算子代数、量子信息与量子计算等方面的学术研究。2005年以来，在《中国科学Ａ》、《中国科学Ｇ》、《数学学报》、《物理学报》、《Inf. Sci.》、《Comm. Theor. Phys.》、《J. Phys. A》、《Math. Anal. Appl.》、《Quantum Inf. Proc.》、《Found. Phys.》、《Acta Math. Sinica》、《Chinese Sci. Bull.》及《Sci. China G》等期刊发表研究论文90多篇。主持国家自然科学基金项目３项、陕西省自然科学基金2项。主持完成科研成果获陕西省科学技术奖与陕西高等学校科学技术奖各1项，合作完成的科研成果3次获陕西省科技进步奖。