根据超密编码原理,考虑到与经典的二进制编码相融合,提出了利用四维二粒子进行超密编码的单向通信方案.在该方案中,信息发送者在对其拥有的粒子进行幺正变换后,将粒子发送给信息接收者.然后信息接收者对二个粒子进行联合测量,根据测量结果,就可以推知信息发送者已作了那种幺正变换,每种幺正变换对应着4 bits经典信息,从而得知信息发送者要传送的信息.最后,对该通信方案进行了安全性分析.

A scheme of one-way communication is presented using four-dimension two-particle system,which is based on the superdense coding combined with the classical binary coding.The information sender performs a unitary operation on the particles,and sends the particles to the information receiver.Then information receiver performs a joint measurement on the two particles after receiving the sender’s particles.The information receiver can know the information sent by the senter according to the joint measurement results and the encoding rules.In this scheme,four-bit classical information can be encoded after performing one unitary transformation.The security of the one-way communication scheme is also analysed.