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arXiv 2002.08431quant-ph
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数相纠缠与Einstein-Podolsky-Rosen转向

Number-phase entanglement and Einstein-Podolsky-Rosen steering

Matteo Fadel, Laura Ares, Alfredo Luis, Qiongyi He

摘要:

我们利用与粒子总数和两个玻色子模的相对相位相关联的算符之间的不确定性关系来构造纠缠和Einstein-Podolsky-Rosen转向准则。这些可以在各种系统中进行实验测试,例如光场、玻色-爱因斯坦凝聚体或机械振荡器。虽然已知的纠缠标准涉及的相位观察通常需要通过重组两个系统进行干涉测量,我们的标准可以通过在两个空间上不同的位置的本地测量进行测试,以调查量子关联的非本地性质。我们提出了简单的例子,我们的标准被违反,并显示其对噪声的鲁棒性。除了对状态表征有用之外,它们还可能在量子信息协议中找到应用,例如基于数相隐形传态的协议。

英文摘要:

We use the uncertainty relation between the operators associated to the total number of particles and to the relative phase of two bosonic modes to construct entanglement and Einstein-Podolsky-Rosen steering criteria. These can be tested experimentally in a variety of systems, such as optical fields, Bose-Einstein condensates or mechanical oscillators. While known entanglement criteria involving the phase observable typically require to perform interference measurements by recombining the two systems, our criteria can be tested through local measurements at two spatially distinct positions, to investigate the nonlocal nature of quantum correlations. We present simple examples where our criteria are violated, and show their robustness to noise. Apart from being useful for state characterization, they might find application in quantum information protocols, for example based on number-phase teleportation.

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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