一种前向纠错差错控制的量子网络广播通信协议

针对量子网络节点在复杂信道环境中可靠广播通信的问题,对其差错控制进行了研究,提出基于前向纠错差错控制的量子网络广播通信协议. 在N+1个量子节点构成的网络中主量子节点向N个从量子节点广播量子信息,依据计算的误码数保留或删除在信息列表中从量子节点的信息,利用纠错码内在特性纠正保留从量子节点量子态的比特翻转和相位翻转错误,因为N个从量子节点测量基序列不同,纠错后N个从量子节点有不同的密钥,弥补了单个从节点泄密而造成整个网络泄密的不足. 最后,在理论上分析了信道利用率及协议安全性.

A New Broadcast Error Control Communication Protocol in Quantum Networks Based on Forward Error Correction

Considering the reliable broadcast communication problem of quantum network nodes in the environment with complicated information channels, the error control issue of this problem was investigated. A communication protocol with broadcast error control for quantum networks was proposed based on forward error correction. For networks containing N+1 quantum nodes, the error counts of N slave nodes are calculated respectively when the master node sends quantum information to N slave nodes, that determine that the slave nodes are retained in or removed from the information list according to the calculated error counts. For states of those retained slave nodes, the errors of bit flips and phase flips of the remaining slave nodes were corrected using the intrinsic characteristic of error-correcting code. Due to the different measuring sequences of the N slave nodes, each slave node has different quantum key. The problem of network leak resulted from the leak of single slave node, if all slave nodes have the same quantum key, can be amended. Finally, analyses of throughput efficiency of information channels as well as the protocol security were presented.