针对采用偏振编码的卫星量子通信中的偏振保持问题,研究了大气散射和卫星与地面站间相对运动对量子偏振态相位和对准的具体影响.仿真分析了量子偏振态相位延迟和对准误差对系统量子误码率的影响,提出了一种新的BB84协议与半波片旋转相结合的偏振补偿方案.该方案通过对准提前量补偿的加入弥补原有补偿方案补偿过程中不能进行通信的缺陷,可基本实现零角度偏振误差,保证卫星量子通信的安全可靠性,且因该方案仅需在原有系统上添加一个半波片,易于实现.
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