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Experimental verification of genuine multipartite entanglement without shared reference frames

  • Article
  • Physics & Astronomy
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Science Bulletin

Abstract

Quantum entanglement is an essential resource for quantum information processing, either for quantum communication or for quantum computation. The multipartite case of entanglement, especially the so called genuine multipartite entanglement, has significant importance for multipartite quantum information protocols. Thus, it is a natural requirement to experimentally verify multipartite quantum entanglement when performing many quantum information tasks. However, this is often technically challenging due to the difficulty of building a shared reference frame among all involved parties, especially when these parties are distant from each other. In this paper, we experimentally verify the genuine tripartite entanglement of a three-photon Greenberger-Horne-Zeilinger state without shared reference frames. A high probability 0.79 of successfully verifying the genuine tripartite entanglement is achieved when no reference frame is shared. In the case of sharing only one common axis, an even higher success probability of 0.91 is achieved.

摘要

量子纠缠在量子信息、量子通信及量子计算中均是一种重要的资源。多体纠缠, 尤其是真多体纠缠对于量子相对于经典信息处理的优势更具基本意义。在实现远距离量子通信或分布式量子计算等协议之前, 对制备的纠缠态进行纠缠性质的实验验证是十分重要且必要的。然而, 传统上使用Bell不等式验证纠缠的方法都要求得到纠缠粒子的各方在对粒子进行测量时选择共同的测量基矢组。这在大空间尺度分发纠缠态, 实现量子协议的实验中, 技术上是很难实现的, 需要耗费大量资源。本实验验证了一种类正四面体基矢组在不共享参考系的情形下, 对于检测真多体纠缠时具有很高的敏感性和成功概率。在3粒子情形下, 3方互相不共享任何参考方向时, 成功概率可达0.79;仅共享一个参考方向时, 成功概率甚至可达0.91。

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (61327901, 61490711, 11274289, 11325419, 61225025, 11474268, and 11374288), the Strategic Priority Research Program (B) of the Chinese Academy of Sciences (XDB01030300), the National Youth Top Talent Support Program of National High-level Personnel of Special Support Program, and the Fundamental Research Funds for the Central Universities (WK2470000018).

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Authors and Affiliations

  1. Key Laboratory of Quantum Information, University of Science and Technology of China, Chinese Academy of Sciences, Hefei, 230026, China

    Zhao Wang, Chao Zhang, Yun-Feng Huang, Bi-Heng Liu, Chuan-Feng Li & Guang-Can Guo

  2. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, 230026, China

    Zhao Wang, Chao Zhang, Yun-Feng Huang, Bi-Heng Liu, Chuan-Feng Li & Guang-Can Guo

Authors
  1. Zhao Wang
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  2. Chao Zhang
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  3. Yun-Feng Huang
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  4. Bi-Heng Liu
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  5. Chuan-Feng Li
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  6. Guang-Can Guo
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Corresponding authors

Correspondence to Yun-Feng Huang or Chuan-Feng Li.

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Wang, Z., Zhang, C., Huang, YF. et al. Experimental verification of genuine multipartite entanglement without shared reference frames. Sci. Bull. 61, 714–719 (2016). https://doi.org/10.1007/s11434-016-1063-5

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  • DOI: https://doi.org/10.1007/s11434-016-1063-5

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