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arXiv 1206.4145quant-ph
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具有固定比率的非确定结果的量子态的最优鉴别

Optimal discrimination of quantum states with a fixed rate of inconclusive outcomes

E. Bagan, R. Munoz-Tapia, G. A. Olivares-Renteria, J. A. Bergou

摘要:

本文给出了最佳区分量子态问题的解决方案,即,当允许一定固定比率的不确定答案时,识别具有最大成功概率的状态。通过改变不确定率,该方案最优地插入到量子态鉴别的两种标准方法--无标度鉴别和最小误差鉴别之间。我们介绍了一个非常一般的方法,使我们能够在广泛的情况下获得的解决方案,并给出了一个完整的表征的最小判别误差作为一个功能的不确定的答案。这个速率的一个临界值是确定的,符合最小故障概率的情况下,明确的歧视是可能的,并提供了一个自然的概括时,国家不能明确区分。该方法说明了两个明确的例子:歧视的两个纯态与任意先验概率和歧视的trine状态。

英文摘要:

In this paper we present the solution to the problem of optimally discriminating among quantum states, i.e., identifying the states with maximum probability of success when a certain fixed rate of inconclusive answers is allowed. By varying the inconclusive rate, the scheme optimally interpolates between Unambiguous and Minimum Error discrimination, the two standard approaches to quantum state discrimination. We introduce a very general method that enables us to obtain the solution in a wide range of cases and give a complete characterization of the minimum discrimination error as a function of the rate of inconclusive answers. A critical value of this rate is identified that coincides with the minimum failure probability in the cases where unambiguous discrimination is possible and provides a natural generalization of it when states cannot be unambiguously discriminated. The method is illustrated on two explicit examples: discrimination of two pure states with arbitrary prior probabilities and discrimination of trine states.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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