自由空间量子密码通信中量子密钥比特率研究(英文)

Study on quantum key bit rate in free-space quantum cryptography

通过引入量子信道传输率、单光子捕获概率、检测因子和数据筛选因子,给出了自由空间量子密钥分配中量 子密钥比特率的表达式。针对低轨卫星-地面站间激光链路,进行了量子密钥比特率的数值仿真研究。结果表明,在低轨 卫星-地面站间进行量子密钥分配是可行的。

The expressions of the quantum key bit rate are given for free-space quantum key distribution by introducing the quantum channel transmission, the single-photon acquisition probability, the detection factor and the sifting factor. The quantum key bit rate is studied in the numerical simulation for the laser links between a ground station and a satellite in a low earth orbit, The results show that it is feasible to implement quantum key distribution between a ground station and a satellite in a low earth orbit.