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提出了一个基于布朗态受控安全量子对话方案.Alice、Bob和Charlie共享一个五粒子布朗态,Alice将自己要传递给Bob的秘密信息通过对其中两个粒子做幺正变换,实现待传的经典信息的编码;同理,Bob对另外两个粒子做相应的幺正操作,实现待传的经典信息的编码;随后,Charlie对布朗终态做布朗基的联合测量,并公布测量结果;Alice和Bob根据Charlie公布的结果及自己编码时用的幺正变换,解码出对方传送的经典信息,完成安全量子对话.与以往的量子对话相比,该方案不仅增加了第三方控制,确保了通信双方对话安全,而且增加了参与通信过程的粒子数目,提高了编码效率.
A secure quantum dialogue scheme based on Brownian state is proposed. Alice, Bob and Charlie share a five-particle Brownian state, and Alice sends secret information to Bob himself. By unitary transformation of two of them, In the same way, Bob performs corresponding unitary operations on the other two particles to realize the encoding of the classic message to be transmitted. Subsequently, Charlie makes a Brownian joint measurement of Brown’s final state and announces the measurement results. Alice And Bob, based on the results announced by Charlie and the unitary transforms used in his coding, decode the classical information transmitted by each other to complete the secure quantum dialogue, which not only adds third-party control to ensure the communication Dialogue between the two sides is secure, and the number of particles involved in the communication process is increased, thereby improving the coding efficiency.