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Quantum storage of entangled photons at telecom wavelengths in a crystal

Author

Listed:
  • Ming-Hao Jiang

    (Nanjing University)

  • Wenyi Xue

    (Nanjing University)

  • Qian He

    (Nanjing University)

  • Yu-Yang An

    (Nanjing University)

  • Xiaodong Zheng

    (Nanjing University)

  • Wen-Jie Xu

    (Nanjing University)

  • Yu-Bo Xie

    (Nanjing University)

  • Yanqing Lu

    (Nanjing University)

  • Shining Zhu

    (Nanjing University)

  • Xiao-Song Ma

    (Nanjing University
    University of Science and Technology of China
    Hefei National Laboratory)

Abstract

Quantum storage and distribution of entanglement are the key ingredients for realizing a global quantum internet. Compatible with existing fiber networks, telecom-wavelength entangled photons and corresponding quantum memories are of central interest. Recently, 167Er3+ ions have been identified as a promising candidate for an efficient telecom quantum memory. However, to date, no storage of entangled photons, the crucial step of quantum memory using these promising ions, 167Er3+, has been reported. Here, we demonstrate the storage and retrieval of the entangled state of two telecom photons generated from an integrated photonic chip. Combining the natural narrow linewidth of the entangled photons and long storage time of 167Er3+ ions, we achieve storage time of 1.936 μs, more than 387 times longer than in previous works. Successful storage of entanglement in the crystal is certified using entanglement witness measurements. These results pave the way for realizing quantum networks based on solid-state devices.

Suggested Citation

  • Ming-Hao Jiang & Wenyi Xue & Qian He & Yu-Yang An & Xiaodong Zheng & Wen-Jie Xu & Yu-Bo Xie & Yanqing Lu & Shining Zhu & Xiao-Song Ma, 2023. "Quantum storage of entangled photons at telecom wavelengths in a crystal," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-42741-1
    DOI: 10.1038/s41467-023-42741-1
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    References listed on IDEAS

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