量子电子学报, 2015, 32 (6): 678, 网络出版: 2015-12-18
卫星量子通信的光子偏振误差影响与补偿研究
Polarization error and compensation in quantum communication using satellites
量子光学 偏振补偿 BB84协议 偏振误差 相位延迟 量子误码率 quantum optics polarization compensation BB84 protocol polarization error phase delay quantum bit error rate
摘要
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。
Abstract
In view of the polarization maintaining problem in quantum communication using satellites,the atmospheric scattering and the relative motion between satellite and ground station which have impact on the photon polarization states in satellite quantum communication were researched. The influence on quantum bit error rate of the system caused by alignment error and phase delay was simulated and analyzed. The existing polarization compensation scheme that combines the BB84 protocol and half wave plate rotating has a defect that cannot communicate in the process of compensation. A new scheme was proposed to overcome the defect by joining the advanced compensation before the alignment. The result is that the polarization error can be compensated to zero and the safe and reliable quantum communication using satellites can be realized. And it’s convenient to realize because the scheme only need to add a half wave plate on the original system.
李铁飞, 李伟, 杨峰, 崔树民. 卫星量子通信的光子偏振误差影响与补偿研究[J]. 量子电子学报, 2015, 32(6): 678. LITiefei, LI Wei, YANG Feng, CUI Shumin. Polarization error and compensation in quantum communication using satellites[J]. Chinese Journal of Quantum Electronics, 2015, 32(6): 678.