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利用交叉克尔非线性可实现量子隐形传态过程中的Bell态非破坏性测量,提出了一个基于量子对称密码框架下弱非线性量子信道认证方案。通信双方以传输介质中交叉克尔非线性构造出两光子量子控制门,将其作为描述量子信道的共享贝尔态,非破坏性测量贝尔态完成对量子信道的认证,并对该方案安全性进行了理论分析。结果表明,此方案可以利用信道传输性能简单有效地实现量子信道的完善性认证。
A non-destructive measurement of Bell states in quantum teleportation process can be realized by using cross-Kerr nonlinearity. A weak nonlinear quantum channel authentication scheme based on quantum symmetric cryptosystem is proposed. The two communicating parties construct a two-photon quantum control gate using the crossed Kerr nonlinearity in the transmission medium as a shared Bell state describing the quantum channel. The non-destructive measurement Bell state completes the authentication of the quantum channel and carries out the security of the scheme The theoretical analysis. The results show that this scheme can utilize the channel transmission performance to realize the perfect authentication of quantum channel simply and effectively.