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<p>The storage of single photons generated via nondegenerate spontaneous parametric down-conversion in a cavity with a PPKTP crystal in quantum memory based on an atomic frequency comb in a Eu:YSO crystal is demonstrated. A technique for preparing spectral profiles within the absorption line of a doped crystal that are matched to the spectrum of single-photon radiation is developed. For storage times of 250 and 166 ns, quantum memory efficiencies of 3 and 7% have been obtained with signal-to-noise ratios of 1/4 and 1/2, respectively.</p>

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Quantum Memory Based on a Eu:YSO Crystal: the Storage and Retrieval of Single-Photon States Generated via Spontaneous Parametric Down-Conversion

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年11月1日

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  • R. A. Akhmedzhanov,
  • L. A. Gushchin,
  • I. V. Zelensky,
  • A. A. Kalachev,
  • I. Z. Latypov,
  • V. A. Nizov,
  • N. A. Nizov,
  • D. A. Sobgayda,
  • D. A. Turaikhanov,
  • N. M. Shafeev,
  • A. V. Shkalikov

摘要

The storage of single photons generated via nondegenerate spontaneous parametric down-conversion in a cavity with a PPKTP crystal in quantum memory based on an atomic frequency comb in a Eu:YSO crystal is demonstrated. A technique for preparing spectral profiles within the absorption line of a doped crystal that are matched to the spectrum of single-photon radiation is developed. For storage times of 250 and 166 ns, quantum memory efficiencies of 3 and 7% have been obtained with signal-to-noise ratios of 1/4 and 1/2, respectively.