报告人: 闫凤利教授

报告时间: 4月24日(周一)下午 15:30-16:30

报告地点: 数学楼301

报告题目: Quantifying the entanglement of quantum channel

报告摘要: In the framework of resource theory of quantum channel, we present three new entanglement measures of channels for a quantum system of arbitrary finite dimension, based on the Choi relative entropy of channels, concurrence and k-ME concurrence, respectively. Rigorous proofs show that these proposed measures fulfill all the requirements dictated by the resource theory of quantum channels, including nonnegativity, weak monotonicity, strong monotone, convexity, additivity, and subadditivity. Comparing with other known measures of the quantum channels, these measures have obvious advantage in computability. According to the power of generating entanglement, we give a classification of quantum channels. Moreover, we provide several examples that characterize the properties of quantum channels and the conversions between quantum coherence states and entangled states and between fully separable states and multipartite entangled states.

报告人简介：闫凤利，博士，二级教授，博导，河北省有突出贡献的中青年专家，享受国务院政府特殊津贴专家，河北省省管优秀专家。2008年获河北省自然科学一等奖（排名第一），2020年获河北省自然科学奖二等奖（排名第二）。2012年获中国物理学会 “最有影响论文奖”一等奖（排名第一），2016年度中国科学“优秀论文奖”。从事量子信息与量子计算研究。在Physical Review Letters等期刊发表SCI论文80余篇。一篇论文被评为英国物理学会17篇最佳优秀论文之一。主持国家自然科学基金面上项目四项、教育部科学技术研究重点项目一项、河北省自然科学基金面上项目五项。作为客座教授或访问学者分别在美国俄勒冈大学，加拿大多伦多大学，德国马普量子光学所访学一年。