Minimax Strategy of Optimal Unambiguous State Discrimination
Wen‐Hai Zhang, Long-Bao Yu, Zhuo‐Liang Cao, Liu Ye · Communications in Theoretical Physics · 2012
In this paper, we consider the minimax strategy to unambiguously discriminate two pure nonorthogonal quantum states without knowing a priori probability. By exploiting the positive-operator valued measure, we derive the upper bound of the minimax measurement of the optimal unambiguous state discrimination. Based on the linear optical devices, we propose an experimentally feasible scheme to implement a minimax measure of a general pair of two nonorthogonal quantum states.