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<p>Efficient quantum storage for polarization-encoded information is essential for quantum communication and quantum computation. However, current high-efficiency quantum storage, particularly those based on electromagnetically induced transparency (EIT) protocol in atomic media, exhibit an inherent sensitivity for photonic polarization. This necessitates transforming the polarization encoding into path encoding, setting strict requirements for phase and alignment stability. In this work, we experimentally demonstrate an efficient and polarization-insensitive optical storage for arbitrary polarized modes into a cold <sup>87</sup>Rb atomic ensemble with a path-separation-free architecture. We obtain a storage efficiency exceeding 50% for the arbitrary polarization mode, and the storage fidelity surpass 95%, which is far above the classical benchmark. The achieved full-polarization-compatible storage for arbitrary polarized modes promises significant advancements in quantum communication and networking.</p>

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Full-polarization-compatible optical storage for arbitrary polarized modes

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月17日

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  • Xin Yang,
  • Jinwen Wang,
  • Zehong Chang,
  • Jianyi Xu,
  • Yongkun Zhou,
  • Shuya Zhang,
  • Xinji Zeng,
  • Shuwei Qiu,
  • Yun Chen,
  • Chengyuan Wang,
  • Dong Wei,
  • Pei Zhang,
  • Fuli Li,
  • Hong Gao

摘要

Efficient quantum storage for polarization-encoded information is essential for quantum communication and quantum computation. However, current high-efficiency quantum storage, particularly those based on electromagnetically induced transparency (EIT) protocol in atomic media, exhibit an inherent sensitivity for photonic polarization. This necessitates transforming the polarization encoding into path encoding, setting strict requirements for phase and alignment stability. In this work, we experimentally demonstrate an efficient and polarization-insensitive optical storage for arbitrary polarized modes into a cold 87Rb atomic ensemble with a path-separation-free architecture. We obtain a storage efficiency exceeding 50% for the arbitrary polarization mode, and the storage fidelity surpass 95%, which is far above the classical benchmark. The achieved full-polarization-compatible storage for arbitrary polarized modes promises significant advancements in quantum communication and networking.