有噪量子信道生存函数研究及其仿真

为了构建高生存性的量子信令网, 基于保真度概念, 提出量子信道生存函数和信令网生存性的概念. 分析光纤和自由空间生存系数, 计算三种消相干机理下有噪量子信道保真度, 给出生存函数测试模型. 仿真分析表明, 通过降低量子态跃迁率, 控制光纤衰减损耗和大气衰减系数, 减小量子态演化时间, 设置量子中继, 可以建立高生存性量子信道, 为量子纠缠信令网标准的制定提供理论基础. 关键词： 量子通信 量子信令网 保真度 生存函数

Study on survival function of noise quantum channel and its simulation

In order to build a quantum signaling network with high survivability, quantum channel survival function and survivability of signaling network have been proposed based on the concept of fidelity. The survival coefficient in optical fiber or free space is analyzed, fidelity in noisy quantum channel with the decoherence mechanisms is calculated and survival function test model is proposed. Simulation analysis shows that, by reducing the quantum state transition rate, controlling fiber attenuation coefficient and atmospheric attenuation coefficient, decreasing the time of quantum states evolution, and setting quantum repeaters, we can construct a high survivability of quantum channel and provide a theoretical foundation for the formulation of quantum entanglement signaling network standard.
Keywords： quantum communication quantum signaling network fidelity survival function