基于奇偶校验极化码的量子密钥纠错方法

Quantum key error correction method based on parity check polar code

为了提升量子密钥分发(QKD)中密钥纠错的性能,提出了一种基于奇偶校验极化码的量子密钥纠错方法。该方法在密钥纠错过程中引入了奇偶校验极化码,并优化了奇偶校验编码策略,利用密钥极化编码后生成的奇偶校验信息完成密钥纠错。仿真结果表明:与现有的基于极化码的密钥纠错方法相比,该方法可以在相同的量子比特误码率下获得更高的纠错效率;当实际QKD实验中的量子比特误码率为0.01048时,其纠错效率达到1.34,安全成码率可达1319 b/s。

To enhance the error correction performance of quantum key distribution(QKD),a quantum key error correction method based on parity check polar codes is proposed.This method introduces parity check polar codes into the key error correction process and optimizes the parity check encoding strategy.It uses the parity check information generated by key polar encoding to complete the key error correction.The simulation results show that compared with the existing polar code-based key error correction method,this method can achieve higher error correction efficiency at the same quantum bit error rate,when the actual QKD experiment's quantum bit error rate is 0.01048,its error correction efficiency reaches 1.34,and the secure coding rate can reach 1319 b/s.