针对多用户量子信令网络的中继模型,本文研究了环境量子噪音对信令远程传输的影响, 分析了量子交换原理, 在此基础上提出了基于纠缠交换的量子信令中继策略, 给出了总线型信令中继网络模型, 并对量子信令远程传输成功率进行了仿真研究.结果表明:量子信令远程传输成功率与噪音功率谱密度、传输距离和中继次数三个因素密切相关;当噪音功率谱密度一定时, 随着传输距离的增大, 信令传输成功率呈准平抛型曲线下降; 在噪音功率谱密度和总的传输距离两个因素都确定的情况下, 随着中继次数的增加, 信令传输成功率显著增大.因此, 为了实现量子信令的可靠传输, 在背景噪音一定时, 必须准确设计传输距离和中继次数.

Aiming at the quantum signalling repeater network model for multi-user, environment quantum noises effect on remote transmission of signalling was studied. A kind of quantum signaling repeater strategy was purposed after the theory of quantum swapping being analyzed. Then a bus network model was put forward and the success rate of long distance quantum signaling transmission was simulated. The results show that long distance signaling transmission has a close relationship with the noise power spectral density, transmission distance and repeater times. When noise power spectral density is constant and there is no repeater during the transmission process, the success rate declines like plesio-flat-parabola with increasing of the transmission distance. On the condition of constant noise power spectral density and constant transmission distance, the success rate increases obviously while the repeater times is increasing. Therefore, on the behalf of reliable quantum signaling transmission the transmission distance and repeater times should be designed properly under the circumstance of constant background noise.