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arXiv 0909.1149quant-ph
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无信号原理约束下的最小误差多状态鉴别

Minimum-error multiple state discrimination constrained by the no-signaling principle

Won-Young Hwang, Joonwoo Bae

摘要:

利用无信号原理,我们给出了区分量子态时的最小误差界。这个束缚是普遍的,因为它既不依赖于要区分的给定量子态的维度,也不依赖于特定的结构。我们证明了对称(纯态和混合态)量子比特态之间的最小误差状态判别的界是紧的。此外,该界还可以应用于一组量子态,对于这组量子态的最小误差态鉴别还不知道。最后,我们的结果加强了两个不去定理,无信号原理和不完美的状态估计之间的定量联系。

英文摘要:

We provide a bound on the minimum error when discriminating among quantum states, using the no-signaling principle. The bound is general in that it depends on neither dimensions nor specific structures of given quantum states to be discriminated among. We show that the bound is tight for the minimum-error state discrimination between symmetric (both pure and mixed) qubit states. Moreover, the bound can be applied to a set of quantum states for which the minimum-error state discrimination is not known yet. Finally, our results strengthen the quantitative connection between two no-go theorems, the no-signaling principle and the no perfect state estimation.

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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