解析量子密钥分配中量子LDPC码的应用

将BB84密钥分配协议看做一个Wire-tap的信道模型,其主信道为二进制对称信道,比特翻转率为025ε,窃听信道是二进制删除信道,删除概率为1-ε.通过量子LDPC编码方式,BB84编写实现主信道的安全通信,同时对BB84协议的安全性进行证明.最后,对Wire-tap信道的安全容量进行计算,最终得到BB84协议下量子LDPC码的可容忍误码率.

Explain on Application of Quantum LDPC Codes in Quantum Key Distribution

This article will BB84 key distribution protocol seen as a Wire-tap channel model, the main channel is a binary symmetric channel, bit flipping rate 0.25ε, Wire-tap channel is a binary erasure channel, deleted probability 1-ε, through quantum LDPC coding way, in the BB84 write about the main channel to achieve secure communication, while the security of the BB84 protocol proof. Finally, the Wire-tap channel capacity of safety is calculated, and ultimately get the BB84 protocol of quantum LDPC codes under the tolerable error rate.