Single-photon source with sub-MHz linewidth for cesium-based quantum information processing  

作　　者：Hai He Peng-Fei Yang Peng-Fei Zhang Gang Li Tian-Cai Zhang 

机构地区：[1]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Collaborative Innovation Center of Extreme Optics,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China

出　　处：《Frontiers of physics》2023年第6期275-281,共7页物理学前沿（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.11974223,and 11974225);the Fund for Shanxi 1331 Project Key Subjects Construction.

摘　　要：A single-photon source with narrow bandwidth,high purity,and large brightness can efficiently interact with material qubits strongly coupled to an optical microcavity for quantum information processing.Here,we experimentally demonstrate a degenerate doubly resonant single-photon source at 852 nm by the cavity-enhanced spontaneous parametric downconversion process with a 100%duty cycle of generation.The single photon source possesses both high purity with a second-order correlation g^((2))_(h)(0)=0.021 and narrow linewidth with△_(V_(sp))=(800±13)kHz.The single-photon s Single-photon source with sub-MHz linewidth for cesium-based quantum information processingource is compatible with the cesium atom D2 line and can be used for cesium-based quantum information processing Single-photon source with sub-MHz linewidth for cesium-based quantum information processing0.021.

关 键 词：single-photon source sub-MHz linewidth few longitudinal modes quantum information processing 

分 类 号：O413[理学—理论物理]