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Efficient distribution of high-dimensional entanglement through 11 km fiber
Optica ( IF 10.4 ) Pub Date : 2020-06-30 , DOI: 10.1364/optica.388773
Xiao-Min Hu , Wen-Bo Xing , Bi-Heng Liu , De-Yong He , Huan Cao , Yu Guo , Chao Zhang , Hao Zhang , Yun-Feng Huang , Chuan-Feng Li , Guang-Can Guo

High-dimensional entanglement enriches our understanding of entanglement and shows many advantages in quantum communications tasks, so its long-distance distribution is a key technology. Here, we use multicore fiber to distribute four-dimensional (4D) entanglement over 11 km. The observed fidelity is $F = 0.921 \pm 0.001$, which is feasible for high-dimensional quantum networks. We observed the violation of high-dimensional Bell inequality (${I_4} = 2.635 \pm 0.014$) and steering inequality (${S_4} = 1.900 \pm 0.003$) for a 4D system over a distance of 11 km and finally demonstrated 4D quantum key distribution based on entanglement in proof of principle. Our work provides an experimental platform for high-dimensional quantum technologies and enables the intracity high-dimensional quantum network.

中文翻译:

通过11 km光纤有效分布高维缠结

高维纠缠丰富了我们对纠缠的理解,并在量子通信任务中显示了许多优点,因此其长距离分布是一项关键技术。在这里,我们使用多芯光纤在11 km上分布四维(4D)纠缠。观察到的保真度为$ F = 0.921 \ pm 0.001 $,这对于高维量子网络是可行的。我们观察到违反了高维Bell不等式($ {I_4} = 2.635 \ pm 0.014 $)和转向不等式($ {S_4} = 1.900 \ pm 0.003 $)在距离11 km的4D系统上运行),并在原理证明中最终证明了基于纠缠的4D量子密钥分配。我们的工作为高维量子技术提供了实验平台,并启用了城内高维量子网络。
更新日期:2020-07-21
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