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arXiv 1902.05587quant-ph
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量子照明的最大优势

The maximum advantage of quantum illumination

Shannon Ray, James Schneeloch, Christopher C. Tison, Paul M. Alsing

摘要:

区分量子态是量子信息协议中的一个基本问题。最佳的方法饱和的Helstrom界,量化的不可避免的错误概率误认为一个状态为另一个。直接计算错误概率需要描述这些状态的密度矩阵的完整知识和对角化。当态的维数变大时,这两个基本要求都变得不切实际地难以达到。在这篇文章中,我们分析了量子照明作为一个量子信道歧视协议,并规避这些问题,使用归一化希尔伯特-施密特内积作为衡量的可扩展性。使用这种措施,我们表明,量子照明比传统照明获得的最大优势发生时,使用贝尔状态。

英文摘要:

Discriminating between quantum states is a fundamental problem in quantum information protocols. The optimum approach saturates the Helstrom bound, which quantifies the unavoidable error probability of mistaking one state for another. Computing the error probability directly requires complete knowledge and diagonalization of the density matrices describing these states. Both of these fundamental requirements become impractically difficult to obtain as the dimension of the states grow large. In this article, we analyze quantum illumination as a quantum channel discrimination protocol and circumvent these issues by using the normalized Hilbert-Schmidt inner product as a measure of distinguishability. Using this measure, we show that the greatest advantage gained by quantum illumination over conventional illumination occurs when one uses a Bell state.

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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