过完备状态最优检测策略的实验实现
Experimental realization of optimal detection strategies for overcomplete states
摘要：
我们提出了广义测量的光学偏振的结果，旨在提供三个或四个不同的结果之一。这使得我们能够区分非正交偏振态，其误差概率接近量子理论所允许的最小值。对三个（三重）或四个（四重）等概率对称非正交偏振态的集合采用这些最佳检测策略，我们获得的互信息超过了使用传统（冯诺依曼）偏振测量可获得的最大值。
英文摘要：
We present the results of generalized measurements of optical polarization designed to provide one of three or four distinct outcomes. This has allowed us to discriminate between nonorthogonal polarization states with an error probability that is close to the minimum allowed by quantum theory. Employing these optimal detection strategies on sets of three (trine) or four (tetrad) equiprobable symmetric nonorthogonal polarization states, we obtain a mutual information that exceeds the maximum value attainable using conventional (von Neumann) polarization measurements.
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