基于量子差分相移系统的混合编码设计方案

A hybrid encoding design based on differential phase shift system

差分相移系统有成钥率高,编码速率快,抗干扰性能强,传输距离大等特点。在分析普克尔斯效应的基础上,提出基于差分相移系统的混合编码设计方案,该方案中发送端通过运用普克尔斯效应进行偏振、相位、时间的混合编码,接收端利用相位干涉和测量时间的控制进行解码。与传统差分相移编码系统分析比较,增加了差分相位编码的相关性,有效提升了差分相位编码的实际安全性,进一步提高了量子密钥的成钥率。

The differential shift phase system features a high rate of generating keys, high speed of coding, powerful ability of being not disturbed and having a long transmission distance and so on. On the analysis of Pockels effectl a hybrid encoding design was proposed which is based on the differential shift phase system. In this design, the transmitting uses the Pockels effect to have the polarization~ phase and time encoded. The receiving terminal decodes by the inference of phase and the control of measuring time. Compared with traditional differential shift phase system analysis, it increases the relativity of differential shift phase code and raises a higher rate of generating quantum keys.