(Peer-Reviewed) Synchronization and Phase Shaping of Single Photons with High-Efficiency Quantum Memory
Keyu Su 苏柯宇 ¹, Yunfei Wang 王云飞 ¹, Shanchao Zhang 张善超 ¹ ², Zhuoping Kong 孔焯平 ¹, Yi Zhong 钟艺 ¹, Jianfeng Li 李建锋 ¹, Hui Yan 颜辉 ¹ ² ³, and Shiliang Zhu 朱诗亮 ¹ ²
¹ Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China
中国 广州 华南师范大学物理与电信工程学院 广东省量子调控工程与材料重点实验室
² Guangdong-Hong Kong Joint Laboratory of Quantum Matter, Frontier Research Institute for Physics, South China Normal University, Guangzhou 510006, China
中国 广州 华南师范大学 物理前沿科学研究院 粤港量子物质联合实验室
³ Guangdong Provincial Engineering Technology Research Center for Quantum Precision Measurement, South China Normal University, Guangzhou 510006, China
中国 广州 华南师范大学 广东省量子精密测量工程技术研究中心
Chinese Physics Letters, 2021-09-02
Abstract
Time synchronization and phase shaping of single photons both play fundamental roles in quantum information applications that rely on multi-photon quantum interference. Phase shaping typically requires separate modulators with extra insertion losses. Here, we develop an all-optical built-in phase modulator for single photons using a quantum memory.
The fast phase modulation of a single photon in both step and linear manner are verified by observing the efficient quantum-memory-assisted Hong–Ou–Mandel interference between two single photons, where the anti-coalescence effect of bosonic photon pairs is demonstrated. The developed phase modulator may push forward the practical quantum information applications.
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