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Experimental realization of entanglement in multiple degrees of freedom between two quantum memories

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  • Wei Zhang

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Dong-Sheng Ding

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Ming-Xin Dong

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Shuai Shi

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Kai Wang

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Shi-Long Liu

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Yan Li

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Zhi-Yuan Zhou

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Bao-Sen Shi

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

  • Guang-Can Guo

    (Key Laboratory of Quantum Information, CAS, University of Science and Technology of China
    Synergetic Innovation Center of Quantum Information & Quantum Physics, University of Science and Technology of China)

Abstract

Entanglement in multiple degrees of freedom has many benefits over entanglement in a single one. The former enables quantum communication with higher channel capacity and more efficient quantum information processing and is compatible with diverse quantum networks. Establishing multi-degree-of-freedom entangled memories is not only vital for high-capacity quantum communication and computing, but also promising for enhanced violations of nonlocality in quantum systems. However, there have been yet no reports of the experimental realization of multi-degree-of-freedom entangled memories. Here we experimentally established hyper- and hybrid entanglement in multiple degrees of freedom, including path (K-vector) and orbital angular momentum, between two separated atomic ensembles by using quantum storage. The results are promising for achieving quantum communication and computing with many degrees of freedom.

Suggested Citation

  • Wei Zhang & Dong-Sheng Ding & Ming-Xin Dong & Shuai Shi & Kai Wang & Shi-Long Liu & Yan Li & Zhi-Yuan Zhou & Bao-Sen Shi & Guang-Can Guo, 2016. "Experimental realization of entanglement in multiple degrees of freedom between two quantum memories," Nature Communications, Nature, vol. 7(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13514
    DOI: 10.1038/ncomms13514
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