Experimental quantum network coding

被引：34

作者：

Lu, He ^{[1
,2
,3
]}

Li, Zheng-Da ^{[1
,2
]}

Yin, Xu-Fei ^{[1
,2
]}

Zhang, Rui ^{[1
,2
]}

Fang, Xiao-Xu ^{[3
]}

Li, Li ^{[1
,2
]}

Liu, Nai-Le ^{[1
,2
]}

Xu, Feihu ^{[1
,2
]}

Chen, Yu-Ao ^{[1
,2
]}

Pan, Jian-Wei ^{[1
,2
]}

机构：

[1] Univ Sci & Technol China, Natl Lab Phys Sci Microscale, Shanghai Branch, Shanghai 201315, Peoples R China

[2] Univ Sci & Technol China, Dept Modern Phys, Shanghai 201315, Peoples R China

[3] Univ Sci & Technol China, Synerget Innovat Ctr Quantum Informat & Quantum P, Hefei 230026, Anhui, Peoples R China

来源：

NPJ QUANTUM INFORMATION | 2019年 / 5卷 / 1期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1038/s41534-019-0207-2

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Distributing quantum state and entanglement between distant nodes is a crucial task in distributed quantum information processing on large-scale quantum networks. Quantum network coding provides an alternative solution for quantum-state distribution, especially when the bottleneck problems must be considered and high communication speed is required. Here, we report the first experimental realization of quantum network coding on the butterfly network. With the help of prior entanglements shared between senders, two quantum states can be transmitted perfectly through the butterfly network. We demonstrate this protocol by employing eight photons generated via spontaneous parametric downconversion. We observe cross-transmission of single-photon states with an average fidelity of 0.9685 +/- 0.0013, and that of two-photon entanglement with an average fidelity of 0.9611 +/- 0.0061, both of which are greater than the theoretical upper bounds without prior entanglement.

引用

页数：5

共 30 条

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