中国物理B ›› 2022, Vol. 31 ›› Issue (11): 110306-110306.doi: 10.1088/1674-1056/ac597b

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Passively stabilized single-photon interferometer

Hai-Long Liu(刘海龙)1,2, Min-Jie Wang(王敏杰)1,2, Jia-Xin Bao(暴佳鑫)1,2, Chao Liu(刘超)1,2, Ya Li(李雅)1,2, Shu-Jing Li(李淑静)1,2, and Hai Wang(王海)1,2,†   

  1. 1 The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 收稿日期:2021-12-09 修回日期:2022-02-01 接受日期:2022-03-02 出版日期:2022-10-17 发布日期:2022-10-25
  • 通讯作者: Hai Wang E-mail:wanghai@sxu.edu.cn
  • 基金资助:
    Project supported by the Ministry of Science and Technology of China (Grant No. 2016YFA0301402), the National Natural Science Foundation of China (Grant No. 12174235), and Shanxi “1331 Project” Key Subjects Construction.

Passively stabilized single-photon interferometer

Hai-Long Liu(刘海龙)1,2, Min-Jie Wang(王敏杰)1,2, Jia-Xin Bao(暴佳鑫)1,2, Chao Liu(刘超)1,2, Ya Li(李雅)1,2, Shu-Jing Li(李淑静)1,2, and Hai Wang(王海)1,2,†   

  1. 1 The State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Opto-Electronics, Shanxi University, Taiyuan 030006, China;
    2 Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • Received:2021-12-09 Revised:2022-02-01 Accepted:2022-03-02 Online:2022-10-17 Published:2022-10-25
  • Contact: Hai Wang E-mail:wanghai@sxu.edu.cn
  • Supported by:
    Project supported by the Ministry of Science and Technology of China (Grant No. 2016YFA0301402), the National Natural Science Foundation of China (Grant No. 12174235), and Shanxi “1331 Project” Key Subjects Construction.

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摘要： A single-photon interferometer is a fundamental element in quantum information science. In most previously reported works, single-photon interferometers use an active feedback locking system to stabilize the relative phase between two arms of the interferometer. Here, we use a pair of beam displacers to construct a passively stable single-photon interferometer. The relative phase stabilization between the two arms is achieved by stabilizing the temperature of the beam displacers. A purely polarized single-photon-level pulse is directed into the interferometer input port. By analyzing and measuring the polarization states of the single-photon pulse at the output port, the achieved polarization fidelity of the interferometer is about 99.1 ±0.1%. Our passively stabilized single-photon interferometer provides a key element for generating high-fidelity entanglement between a photon and atomic memory.

关键词: passively stable, single-photon interferometer, atom-photon entanglement, polarization fidelity

Abstract: A single-photon interferometer is a fundamental element in quantum information science. In most previously reported works, single-photon interferometers use an active feedback locking system to stabilize the relative phase between two arms of the interferometer. Here, we use a pair of beam displacers to construct a passively stable single-photon interferometer. The relative phase stabilization between the two arms is achieved by stabilizing the temperature of the beam displacers. A purely polarized single-photon-level pulse is directed into the interferometer input port. By analyzing and measuring the polarization states of the single-photon pulse at the output port, the achieved polarization fidelity of the interferometer is about 99.1 ±0.1%. Our passively stabilized single-photon interferometer provides a key element for generating high-fidelity entanglement between a photon and atomic memory.

Key words: passively stable, single-photon interferometer, atom-photon entanglement, polarization fidelity

中图分类号:  (Quantum information)

  • 03.67.-a
03.67.Bg (Entanglement production and manipulation) 85.35.Ds (Quantum interference devices)