Experimental verification of multidimensional quantum steering
Experimental verification of multidimensional quantum steering
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DOI：
10.1016/j.optcom.2017.11.070
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发表时间：
2016-02
影响因子：
2.4
通讯作者：
Che-Ming Li;Hsin-Pin Lo;Liang Chen;A. Yabushita
中科院分区：
文献类型：
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作者：
Che-Ming Li;Hsin-Pin Lo;Liang Chen;A. Yabushita
量子控制使一方能够与另一远程方通信，即使发送方不受信任。量子系统的这些特性不仅为量子信息科学提供了直接的应用，而且在概念上也对区分量子资源和经典资源具有重要意义。虽然已经在几个实验中展示了操纵的具体例子，但量子操纵还没有被证明适用于更高维的系统。在这里，我们介绍了一种简单的方法来实验证明两种不同的量子操控：Einstein-Podolsky-Rosen(EPR)操控和单系统(SS)操控(即时间操控)，维度(D)高达d=16。前者揭示了两部分系统之间的可操纵性，而后者表现在单个量子物体中。我们使用多维转向见证来验证偏振纠缠对的EPR转向和单光子的SS转向。对于EPR和SS转向，观测到的目击者与经典拟态所达到的最大值之间的比率都随着d的增加而增加。所设计的场景为进一步研究大维的真正多体操控及其在量子信息处理中的潜在应用提供了一种新的方法。
Quantum steering enables one party to communicate with another remote party even if the sender is untrusted. Such characteristics of quantum systems not only provide direct applications to quantum information science, but are also conceptually important for distinguishing between quantum and classical resources. While concrete illustrations of steering have been shown in several experiments, quantum steering has not been certified for higher dimensional systems. Here, we introduce a simple method to experimentally certify two different kinds of quantum steering: Einstein–Podolsky–Rosen (EPR) steering and single-system (SS) steering (ie, temporal steering), for dimensionality (d) up to d= 16. The former reveals the steerability among bipartite systems, whereas the latter manifests itself in single quantum objects. We use multidimensional steering witnesses to verify EPR steering of polarization-entangled pairs and SS steering of single photons. The ratios between the measured witnesses and the maximum values achieved by classical mimicries are observed to increase with d for both EPR and SS steering. The designed scenario offers a new method to study further the genuine multipartite steering of large dimensionality and potential uses in quantum information processing.