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arXiv 1502.04825quant-ph
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前馈控制在噪声信道中鉴别两个非正交态

Discriminating two nonorthogonal states against a noise channel by feed-forward control

Li-Sha Guo, Bao-Ming Xu, Jian Zou, Chao-Quan Wang, Hai-Li, Jun-Gang Li, Bin Shao

摘要:

本文提出了一种基于最小误差鉴别的方法,通过前馈控制(FFC)来实现对经过噪声信道后的两个非正交态的较好鉴别。我们表明,我们的计划的应用程序可以大大提高歧视的效果相比,ME歧视没有FFC的任何一对非正交的状态和任何程度的振幅阻尼(AD)。特别地,我们的最优鉴别的效果可以达到两个初始非正交纯态在噪声信道存在下的确定性鉴别效果,甚至优于概率鉴别效果.

英文摘要:

We propose a scheme by using the feed-forward control (FFC) to realize a better effect of discrimination of two nonorthogonal states after passing a noise channel based on the minimum- error (ME) discrimination. We show that the application of our scheme can highly improve the effect of discrimination compared with the ME discrimination without the FFC for any pair of nonorthogonal states and any degree of amplitude damping (AD). Especially, the effect of our optimal discrimination can reach that of the two initial nonorthogonal pure states in the presence of the noise channel in a deterministic way for equal a prior probabilities or even be better than that in a probabilistically way for unequal a prior probabilities.

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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