量子信令中继器模型及性能仿真

为了解决量子信令远程传输损伤问题,提出了一种量子信令中继器模型. 在该模型中,首先对接收到的信令量子态进行纠缠纯化和纠缠分发,这样就可在收发双方之间建立纠缠信道. 其次,通过纠缠交换,传送所要发送的量子信令,从而完成量子信令的中继. 仿真结果表明,在保真度为0.98、纠缠对成功建立概率为0.98的条件下, 信令中继成功率可以达到97%以上;在纠缠交换概率、纯化概率和纠缠对成功建立概率都为0.98时, 量子信令中继器的吞吐量可达到183kbps,以上各项指标能够有效满足量子通信对信令中继的要求. 关键词： 量子通信 量子信令 纠缠纯化 纠缠分发

A model of quantum signaling repeater and its parameters simulation

In order to solve the damage problem during remote transmission of quantum signaling, a repeater model of signaling quantum is proposed. In this model, firstly purifying and distributing entanglement of the received signaling quantum state is carried out, to establish entangled channels between the signed sending and receiving. Secondly, through quantum entanglement swapping the quantum signaling is transmitted, for completing the quantum signaling relay. Simulation results show that the success rate of signaling relay can reach more than 97% under the condition that the fidelity is 0.98 and the entangled pairs successful establishing rate is 0.98; the throughput of quantum signaling relay is up to 183kbps when the probability of entanglement swapping, purification, and entangled pairs successful establishing is 0.98.
Keywords： quantum communications quantum signaling entanglement purification entanglement distributing