Passively stabilized single-photon interferometer  

作　　者：Hai-Long Liu Min-Jie Wang Jia-Xin Bao Chao Liu Ya Li Shu-Jing Li Hai Wang 刘海龙;王敏杰;暴佳鑫;刘超;李雅;李淑静;王海(The State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China;Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China)

机构地区：[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

出　　处：《Chinese Physics B》2022年第11期231-235,共5页中国物理B（英文版）

基　　金：Project supported by the Ministry of Science and Technology of China(Grant No.2016YFA0301402);the National Natural Science Foundation of China(Grant No.12174235);Shanxi“1331 Project”Key Subjects Construction。

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 highfidelity entanglement between a photon and atomic memory.

关 键 词：passively stable single-photon interferometer atom-photon entanglement polarization fidelity 

分 类 号：O436.1[机械工程—光学工程]