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arXiv 1707.09237quant-ph
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用于空间、时间和通道转向的统一图像

Unified picture for spatial, temporal and channel steering

Roope Uola, Fabiano Lever, Otfried Gühne, Juha-Pekka Pellonpää

摘要:

量子操纵描述了量子系统上的局部作用如何影响另一个类似空间的分离量子态。最近,量子操纵也被制定为类时场景和量子信道。我们使用量子信道的Stinespring膨胀工具来处理所有三种情况。通过应用我们的技术,我们将所有三个转向问题与量子测量的不兼容性一一联系起来,这是以前只知道空间转向的结果。我们利用这种连接,显示如何测量不确定性关系可以被用来作为紧督导不平等的所有三种情况。此外,我们证明了时间和空间转向的某些概念是完全等价的,并证明了时间转向和宏观现实隐变量模型之间的层次结构。

英文摘要:

Quantum steering describes how local actions on a quantum system can affect another, space-like separated, quantum state. Lately, quantum steering has been formulated also for time-like scenarios and for quantum channels. We approach all the three scenarios as one using tools from Stinespring dilations of quantum channels. By applying our technique we link all three steering problems one-to-one with the incompatibility of quantum measurements, a result formerly known only for spatial steering. We exploit this connection by showing how measurement uncertainty relations can be used as tight steering inequalities for all three scenarios. Moreover, we show that certain notions of temporal and spatial steering are fully equivalent and prove a hierarchy between temporal steering and macrorealistic hidden variable models.

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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