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Elimination of noise in optically rephased photon echoes

Author

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  • You-Zhi Ma

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Ming Jin

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Duo-Lun Chen

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Zong-Quan Zhou

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Chuan-Feng Li

    (University of Science and Technology of China
    University of Science and Technology of China)

  • Guang-Can Guo

    (University of Science and Technology of China
    University of Science and Technology of China)

Abstract

Photon echo is a fundamental tool for the manipulation of electromagnetic fields. Unavoidable spontaneous emission noise is generated in this process due to the strong rephasing pulse, which limits the achievable signal-to-noise ratio and represents a fundamental obstacle towards their applications in the quantum regime. Here we propose a noiseless photon-echo protocol based on a four-level atomic system. We implement this protocol in a Eu3+:Y2SiO5 crystal to serve as an optical quantum memory. A storage fidelity of 0.952 ± 0.018 is obtained for time-bin qubits encoded with single-photon-level coherent pulses, which is far beyond the maximal fidelity achievable using the classical measure-and-prepare strategy. In this work, the demonstrated noiseless photon-echo quantum memory features spin-wave storage, easy operation and high storage fidelity, which should be easily extended to other physical systems.

Suggested Citation

  • You-Zhi Ma & Ming Jin & Duo-Lun Chen & Zong-Quan Zhou & Chuan-Feng Li & Guang-Can Guo, 2021. "Elimination of noise in optically rephased photon echoes," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24679-4
    DOI: 10.1038/s41467-021-24679-4
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    Cited by:

    1. Xiao Liu & Xiao-Min Hu & Tian-Xiang Zhu & Chao Zhang & Yi-Xin Xiao & Jia-Le Miao & Zhong-Wen Ou & Pei-Yun Li & Bi-Heng Liu & Zong-Quan Zhou & Chuan-Feng Li & Guang-Can Guo, 2024. "Nonlocal photonic quantum gates over 7.0 km," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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