Five-user quantum virtual local area network with an AlGaAs entangled photon source  

作　　者：Cheng Qian Hongkai Tian Xu Jing Yichen Liu Zhe Chen Huiran Luo Yuan Du Xiaodong Zheng Tangsheng Chen Yuechan Kong Hua-Lei Yin Dong Jiang Bin Niu Liangliang Lu 

机构地区：[1]Key Laboratory of State Manipulation and Advanced Materials in Provincial Universities,School of Physical Science and Technology,Nanjing Normal University,Nanjing,210023,China [2]School of Internet,Anhui University,Hefei,230039,China [3]National Key Laboratory of Solid-State Microwave Devices and Circuits,Nanjing Chip Valley Industrial Technology Institute,Nanjing Electronic Devices Institute,Nanjing,210016,China [4]Research Center for Quantum Optics and Quantum Communication,School of Science,Qingdao University of Technology,Qingdao,266520,China [5]Department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-nano Devices,Key Laboratory of Quantum State Construction and Manipulation(Ministry of Education),Renmin University of China,Beijing,100872,China [6]Beijing Academy of Quantum Information Sciences,Beijing,100193,China [7]National Engineering Research Center of Agro-Ecological Big Data Analysis and Application,Anhui University,Hefei,230601,China [8]National Laboratory of Solid-State Microstructures and School of Physics,Nanjing University,Nanjing,210093,China [9]Hefei National Laboratory,Hefei,230088,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2025年第3期61-73,共13页中国科学:物理学、力学、天文学(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12274233,and 12274223);the Major Scientific Research Project of Anhui Province(Grant No.KJ2021ZD0005);the Scientific Research Planning Project of Anhui Province(Grant No.2022AH040020);the University Collaborative Innovation Project of Anhui Province(Grant No.GXXT-2021-091);the Program of Song Shan Laboratory(Included in the Management of Major Science and Technology Program of Henan Province)(Grant No.221100210800-02);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(Grant No.SJCX23_0569)。

摘　　要：The promotion of quantum network applications demands the scalable connection of quantum resources.It is preferable to set up multiple logical networks coexisting on a single physical network infrastructure to accommodate a larger number of users.Here we present a quantum virtual network architecture that offers this level of scalability,without being constrained to a fixed physical-layer network relying solely on passive multiplexing components.The architecture can be understood as arising from the superposition of a fully connected entanglement distribution network and port-based virtual local area network,which group multiusers by access ports.In terms of hardware,we leverage a semiconductor chip with a high figure-of-merit modal overlap to directly generate high-quality polarization entanglement,and a streamlined polarization analysis module,which requires only one single-photon detector for each end user.We experimentally perform the BBM92 QKD protocol on the five-user quantum virtual network and demonstrate voice and image encryption on a campus area network.Our results may provide insights into the realization of large-scale quantum networks with integrated and cost-efficient photonic architecture.

关 键 词：quantum network quantum entanglement distribution integrated photonics image and voice encryption 

分 类 号：O41[理学—理论物理]