接收端基矢旋转对星舰量子密钥分发的影响  

Influence of Receiver Basis Vectors Rotation on Satellite-to-Ship Quantum Key Distribution

作　　者：聂敏 张帆 杨光 张美玲[1] 孙爱晶 裴昌幸 Nie Min;Zhang fan;Yang Guang;Zhang Meiling;Sun Aijing;Pei Changxing(School of Communication and Information Engineering,Xi'an University of Post&Telecommunications,Xi'an,Shaanxi 710121,China;School of Electronics and Information,Northwestern Polytechnical University,Xi'an,Shaanxi 710072,China;State Key Laboratory of Integrated Service Networks,Xidian University,Xi'an,Shaanxi 710071,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]西北工业大学电子信息工程学院,陕西西安710072 [3]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《激光与光电子学进展》2021年第3期274-278,共5页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61971348,61201194);陕西省国际科技合作与交流计划(2015KW-013);陕西省教育厅科研计划(16JK1711)。

摘　　要：在星舰量子密钥分发系统中,发送量子密钥的量子卫星是低轨道卫星,追踪量子卫星的接收设备安装在船舰上。接收设备需要追踪卫星的运动,接收端基矢不可避免地会发生旋转。分析了导致基矢旋转的原因,针对BB84协议,建立了基矢旋转角与量子误码率、获取信息量的定量关系。结果表明,当传输距离为200 km,基矢旋转角分别为2°和10°时,量子误码率和获取的信息量分别为8.255×10^(−5)和0.99、2.044×10^(−3)和0.91。基矢旋转角大于2°时,星舰量子密钥分发系统的性能有明显下降,这表明进行星舰量子密钥分发时,需根据基矢旋转角的大小提前进行自适应校正。In the satellite-to-ship quantum key distribution system,the quantum satellite that sends the quantum key is a low-orbiting satellite.The receiver equipment that tracks the quantum satellite is installed on the ship.Because the receiver equipment needs to track the movement of the satellite,the basis vectors of receiver equipment are inevitably rotated.In this work,the reason for the rotation of the basis vector is analyzed,and the quantitative relationship between the rotation angle of the basis vector,the quantum error rate,and the amount of information obtained,is established for the BB84 protocol.The results show that when the transmission distance is 200 km and the rotation angle of the basis vector is 2°and 10°,respectively,the quantum error rate and the amount of information acquired are 8.255×10^(−5) and 0.99,2.044×10^(−3) and 0.91,respectively.When the rotation angle of the basis vector is greater than 2°,the performance of the satellite-to-ship quantum key distribution system is significantly reduced.This indicates that when the satellite-to-ship quantum key is distributed,it is necessary to perform an adaptive correction in advance according to the rotation angle of the basis vector.

关 键 词：量子光学 基矢旋转 星舰量子密钥分发 量子误码率 安全密钥 

分 类 号：TN929.12[电子电信—通信与信息系统]