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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 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 |
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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.
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Received: 09 December 2021
Revised: 01 February 2022
Accepted manuscript online: 02 March 2022
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PACS:
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03.67.-a
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(Quantum information)
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03.67.Bg
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(Entanglement production and manipulation)
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85.35.Ds
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(Quantum interference devices)
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| Fund: 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. |
Corresponding Authors:
Hai Wang
E-mail: wanghai@sxu.edu.cn
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Cite this article:
Hai-Long Liu(刘海龙), Min-Jie Wang(王敏杰), Jia-Xin Bao(暴佳鑫), Chao Liu(刘超), Ya Li(李雅), Shu-Jing Li(李淑静), and Hai Wang(王海) Passively stabilized single-photon interferometer 2022 Chin. Phys. B 31 110306
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