摘要
采用量子纠缠进行时钟同步的测量精度在理想信道传输中可以达到飞秒级;但纠缠光子在非理想信道(大气层)传输中将产生传输时延。分析了因大气吸收效应和散射效应产生的衰减和散射效应引起的时延,重点分析了两者对于量子时钟同步测量结果的影响。仿真表明,经过大气传输后量子时钟同步测量精度为0.01 ns,传输经验模型造成误差为1 ns。
The clock synchronization accuracy of satellite navigation system based on quantum clock synchronization can be on the order of femto-seconds,however the time delay exists while entangled photons transmission in the atmosphere.Attenuation caused by atmospheric absorption and time delay caused by scattering is discussed.Meanwhile the impact of these two factors is discussed.The simulation results show that the accuracy is 0.01 ns,the error caused by model is 1 ns.
出处
《科学技术与工程》
北大核心
2014年第19期172-175,共4页
Science Technology and Engineering
基金
国家自然科学基金(61203201)
陕西省自然科学基金项目(2012JQ8017)资助
关键词
时钟同步
量子纠缠
大气
clock synchronization
quantum entanglement
atmosphere
