High-fidelity,low-latency polarization quantum state transmissions over a hollow-core conjoined-tube fiber at around 800 nm

作     者：Xinyu Chen Wei Ding Ying-Ying Wang Shou-Fei Gao Feixiang Xu Huichao Xu Yi-Feng Hong Yi-Zhi Sun Pu Wang Yan-Qing Lu Lijian Zhang 

作者机构：National Laboratory of Solid State MicrostructuresCollege of Engineering and Applied SciencesCollaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093China Institute of Photonics TechnologyJinan UniversityGuangzhou 510632China Institute of Laser EngineeringBeijing University of TechnologyBeijing 100124China 

出 版 物：《Photonics Research》 (光子学研究（英文版）)

年 卷 期：2021年第9卷第4期

页      面：460-470页

核心收录：

学科分类：0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：National Key Research and Development Program of China(2017YFA0303703,2017YFA0303800) National Natural Science Foundation of China(61535009,61575218,61675011,61827820,61975077,91836303) Beijing Nova Program(Z181100006218097) Beijing Municipal Commission of Education(KZ201810005003) Fundamental Research Funds for the Central Universities(020214380068) 

主　　题：polarization fiber quantum 

摘      要：Hollow-core fiber(HCF)promises to unify air-borne light propagation and non-line-of-sight transmission,thus holding great potential for versatile photonics-based quantum information *** early version of HCF based on photonic-bandgap guidance has not proven itself a reliable quantum channel because of the poor modal purity in both spatial and polarization domains,as well as significant difficulty in fabrication when the wavelength shifts to the visible *** this work,based on the polarization degree of freedom,we demonstrate high-fidelity(∼0.98)single-photon transmission and distribution of entangled photons over a 36.4 m hollow-core conjoined-tube fiber(CTF)by using commercial silicon single-photon avalanche *** CTF realizes the combined merits of low loss,high spatial modal purity,low polarization degradation,and low chromatic *** also demonstrate single-photon low-latency(∼99.96%speed of light in vacuum)transmission,paving the way for extensive uses of HCF links in versatile photonics-based quantum information processing.