量子密钥分发误码协调算法分析

Error Reconciliation Algorithm for Quantum Key Distribution

误码消除是量子密钥分发过程的关键技术之一。分析了奇偶-汉明单向函数纠错算法的原理,给出了对原始量子密钥进行误码协调的步骤及表达式,对这种算法的纠错能力进行了理论和实验分析。结果显示,当原始密钥误码率为11%时,利用该纠错技术能够完全消除误码,且最终密钥生成效率与密钥的原始误码率直接相关。

Error reconciliation is a necessary step for quantum key distribution process. The efficiency and the correction ability of error reconciliation procedures are analyzed and estimated, and it gives some expressions about it. The experiment results indicate that it can easily eliminate all errors when the error rate is at 11%.