Compact source for quadripartite deterministically entangled optical fields  

作　　者：Yanhong Liu Yaoyao Zhou Liang Wu Jiliang Qin Zhihui Yan Xiaojun Jia 

机构地区：[1]Department of Physics,Taiyuan Normal University,Jinzhong 030619,China [2]Institute of Computational and Applied Physics,Taiyuan Normal University,Jinzhong 030619,China [3]State Key Laboratory of Quantum Optics and Quantum Optics Devices,Institute of Opto-Electronics,Shanxi University,Taiyuan 030006,China [4]Collaborative Innovation Center of Extreme Optics,Shanxi University,Taiyuan 030006,China [5]College of Information Engineering,Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619,China

出　　处：《Fundamental Research》2025年第1期132-137,共6页自然科学基础研究(英文版)

基　　金：supported by the National Natural Science Foundation of China(62122044,61925503,12004276,11904218,12147215,62135008,and 11834010);the Scientific and Technological Innovation Programs of Higher Education Institutions in Shanxi,China(2020L0516,2019L0092,and 2020L0029);the Program for the Innovative Talents of Higher Education Institutions of Shanxi;the Program for the Outstanding Innovative Teams of Higher Learning Institutions of Shanxi;the fund for Shanxi“1331 Project”Key Subjects Construction.

摘　　要：Since entangled multiple optical fields were identified as the building blocks of quantum networks,the quadripartite entangled optical fields have been produced by using four degenerate optical parametric amplifiers or two nondegenerate optical parametric amplifiers(NOPAs).However,realizing an efficient and compact source for multiple quantum users has remained an outstanding challenge,hindering their practical applications.Here,we proposed a compact and feasible scheme to deterministically entangle four spatially separated optical fields,employing only a single NOPA.Accordingly,two-sided output NOPA-based optical fields were coupled on a beam splitter network to form the quadripartite entangled state,causing the deterministic generation of both the Greenberger–Horne–Zeilinger(GHZ)and the linear cluster states in this compact entanglement source.We also obtained the optimal experimental parameters based on the simulation results,thereby providing a direct reference for experimental implementation.Our findings propose that the resultant GHZ and linear cluster states can be potentially applied in quantum-enhanced information science,specifically in quantum secret sharing,controlled quantum teleportation networks,and quantum-entangled atomic ensemble networks.

关 键 词：Quadripartite entanglement Single NOPA Compact source GHZ state Cluster state 

分 类 号：O41[理学—理论物理]