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arXiv 1706.04853quant-ph
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量子性的统一框架--相干、不和谐与纠缠

Unified framework for quantumness -- coherence, discord, and entanglement

Xiao Yuan, Hongyi Zhou, Mile Gu, Xiongfeng Ma

摘要:

从操作的角度来看,量子性表征了物理过程中无法用牛顿物理学解释的奇异行为。有几种广泛使用的量子性度量,包括相干性、不和谐性和纠缠性,每一种都被证明是特定情况下的基本资源。有证据表明,这三项措施之间存在着根本的联系。然而,这些量子仍然被不同地看待,这种联系尚未得到阐明。在这里,我们介绍了一个通用的框架,定义一个统一的量子与操作的动机建立在干涉测量的能力。在局域测量、弱参考系自由测量和强参考系自由测量的不同情况下,量子性分别表现为相干、不和谐和纠缠。我们的研究结果还阐述了这三个措施是如何相关的,以及它们如何相互转化。这个框架可以进一步扩展到其他场景,并作为一个通用的量子度量。

英文摘要:

From an operational perspective, quantumness characterizes the exotic behavior in a physical process which cannot be explained with Newtonian physics. There are several widely used measures of quantumness, including coherence, discord, and entanglement, each proven to be essential resources in particular situations. There exists evidence of fundamental connections amongst the three measures. However, those quantumnesses are still regarded differently and such connections are yet to be elucidated. Here, we introduce a general framework of defining a unified quantumness with an operational motivation founded on the capability of interferometry. The quantumness appears differently as coherence, discord, and entanglement in different scenarios with local measurement, weak reference frame free measurement, and strong reference frame free measurement, respectively. Our results also elaborate how these three measures are related and how they can be transformed from each other. This framework can be further extended to other scenarios and serves as a universal quantumness measure.

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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