关键词: 量子通信, 七粒子纠缠态, 纠错, 保真度

Abstract: While the communication between two sites in the quantum network is carrying out, the data frames should be resend once the bit-reversed errors are appeared. Although this method can guarantee the accuracy of the data, the pressure of the channel is increased and the communication efficiency is reduced.In order to relieve the pressure of the channel, the present quantum Bit-reversed error correction circuits are analyzed and improved which based on the replication of entanglement and the teleportation to design the seven-particle entanglement of quantum Bit-reversed error correction circuits. This improvement can not correct more than three bit-reversed quantum states or phase flip error.The efficiency of protocol and the utilization of channels which before and after the improvement are compared, the results show that the latter has higher data transmission utilization and the study will supply reference evidence for multi-particle error correction.

Key words: quantum communication, seven particle entangled states, error correction, fidelity