Experimental observation the Einstein-Podolsky-Rosen Steering based on the detection of entanglement.
Experimental observation the Einstein-Podolsky-Rosen Steering based on the detection of entanglement.
复制标题
DOI：
10.1103/physreva.101.042115
复制
发表时间：
2019-12
期刊：
影响因子：
--
通讯作者：
Huan Yang;Zhi-Yong Ding;Dong Wang;Hao Yuan;Xue-ke Song;Jie Yang;Chang-Jin Zhang;L. Ye
中科院分区：
文献类型：
--
作者：
Huan Yang;Zhi-Yong Ding;Dong Wang;Hao Yuan;Xue-ke Song;Jie Yang;Chang-Jin Zhang;L. Ye
Einstein-Podolsky-Rosen(EPR)转向是介于纠缠和贝尔非局域性之间的一种中间量子非局域性，在量子信息处理任务中起着重要的作用。在过去的几年里，关于电动助力转向的研究已经在一系列的实验中得到了证实。然而，这些研究依赖于相关的转向不平等和测量设置的选择。在这里，我们通过纠缠检测来实验验证EPR转向，而不使用任何转向不等价性和测量设置。通过从两个量子比特的靶态构造两个新态，我们通过检测这些新态的纠缠来观察EPR转向。结果表明，新构造态的纠缠可以作为靶态的一种新的引导见证。与肖等人的结果进行了比较。[物理。莱特牧师。118,140404(2017年)]，我们发现在我们的场景中检测EPR转向的能力比两集投影测量更强，可以观察到更多的可操纵状态。因此，我们的演示可以加深对EPR转向和纠缠之间联系的理解。
The Einstein-Podolsky-Rosen (EPR) steering is an intermediate quantum nonlocality between entanglement and Bell nonlocality, which plays an important role in quantum information processing tasks. In the past few years, the investigations concerning EPR steering have been demonstrated in a series of experiments. However, these studies rely on the relevant steering inequalities and the choices of measurement settings. Here, we experimentally verify the EPR steering via entanglement detection without using any steering inequality and measurement setting. By constructing two new states from a two-qubit target state, we observe the EPR steering by detecting the entanglement of these new states. The results show that the entanglement of the newly constructed states can be regarded as a new kind of steering witness for target states. Compared to the results of Xiao et al. [Phys. Rev. Lett. 118, 140404 (2017)], we find that the ability of detecting EPR steering in our scenario is stronger than two-setting projective measurements, which can observe more steerable states. Hence, our demonstrations can deepen the understanding of the connection between the EPR steering and entanglement.