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- W3100361741 abstract "The operational meaning of coherence measure lies at very heart of the coherence theory. In this paper, we provide an operational interpretation for geometric coherence, by proving that the geometric coherence of a quantum state is equal to the minimum error probability to discriminate a set of pure states with von Neumann measurement. On the other hand, we also show that a task to ambiguously discriminate a set of linearly independent pure states can be also regards as a problem of calculating geometric coherence. That is, we reveal an equivalence relation between ambiguous quantum state discrimination and geometric coherence. Based on this equivalence, moreover, we improve the upper bound for geometric coherence and give the explicit expression of geometric coherence for a class of states. Besides, we establish a complementarity relation of geometric coherence and path distinguishability, with which the relationship between $l_1$-norm of coherence and geometric coherence is obtained. Finally, with geometric coherence, we study multiple copies quantum state discrimination and give an example to show how to discriminate two pure states." @default.
- W3100361741 created "2020-11-23" @default.
- W3100361741 creator A5042162337 @default.
- W3100361741 creator A5061471923 @default.
- W3100361741 date "2018-09-14" @default.
- W3100361741 modified "2023-09-27" @default.
- W3100361741 title "Geometric coherence and quantum state discrimination" @default.
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- W3100361741 doi "https://doi.org/10.1088/1751-8121/aac979" @default.
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