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arXiv 1702.02156quant-phcs.ITmath.IT
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非定域BosonSampling中的量子关联

Quantum Correlations in Nonlocal BosonSampling

Farid Shahandeh, Austin P. Lund, Timothy C. Ralph

摘要:

确定空间分离系统之间关联的量子性质在量子信息科学中起着至关重要的作用。特别令人感兴趣的是这些相关性是否以及如何使量子信息协议更强大的问题。在这里,我们报告了一个分布式量子计算协议,其中的输入和输出量子态被认为是经典相关的量子信息学。然而,我们表明,不能有效地模拟使用经典算法的输出状态的测量结果之间的相关性。至关重要的是,与此同时,本地测量结果可以在经典计算机上有效地模拟。我们发现,唯一已知的经典标准违反了我们的协议中的输入和输出状态是一个在量子光学中使用的,即相空间非经典。因此,我们认为,我们的协议的输出状态中固有的全局相空间非经典代表真正的量子相关性。

英文摘要:

Determination of the quantum nature of correlations between two spatially separated systems plays a crucial role in quantum information science. Of particular interest is the questions of if and how these correlations enable quantum information protocols to be more powerful. Here, we report on a distributed quantum computation protocol in which the input and output quantum states are considered to be classically correlated in quantum informatics. Nevertheless, we show that the correlations between the outcomes of the measurements on the output state cannot be efficiently simulated using classical algorithms. Crucially, at the same time, local measurement outcomes can be efficiently simulated on classical computers. We show that the only known classicality criterion violated by the input and output states in our protocol is the one used in quantum optics, namely, phase-space nonclassicality. As a result, we argue that the global phase-space nonclassicality inherent within the output state of our protocol represents true quantum correlations.

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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