基于偏振编码的副载波复用量子密钥分发研究

Subcarrier multiplexing quantum key distribution based on polarization coding

提出了一种采用相位合成偏振态编码的副载波复用量子密钥分发方案,该方案在不增加系统设备的前提下允许多路量子密钥通过并行的边带信道同时进行分发.每一个边带的偏振态可通过控制副载波的相位随机且独立地合成.该方案允许量子密钥系统的成钥率成倍的增加.仿真实验证明,通过调整每个副载波相位能够理想地调整和控制边带的偏振态.

A subcarrier multiplexing quantum key distribution is based on phase modulation polarization coding scheme. The key could be shared by several parallel sideband channels, and each sideband has a random and independent polarization which is synthesized by controlling the phase difference of subcarriers in two electro-optical phase modulators. The key rate could be increased multiply. The simulation result shows that the scheme works well.