学术报告
三体量子失协介绍
题 目：三体量子失协介绍
报告人：麻志浩教授 （上海交通大学数学系）
摘要: We present an analytical solution for classical correlation, defined in terms of linear entropy, in an arbitrary $d/otimes 2$ system {when the second subsystem is measured}. We show that the optimal measurements used in the maximization of the classical correlation in terms of linear entropy, when used to calculate the quantum discord in terms of von Neumann entropy, result in a tight upper bound for arbitrary $d/otimes 2$ systems. This bound agrees with all known analytical results about quantum discord in terms of von Neumann entropy and, when comparing it with the numerical results for $10^6$ two-qubit random density matrices, we obtain an average deviation of order $10^{-4}$. Furthermore, our results give a way to calculate the quantum discord for arbitrary $n$-qubit GHZ and W states evolving under the action of the amplitude damping noisy channel.
时间：4月28日（周四）上午9:00-10:00
地点：首都师大北二区教学楼132教室
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