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提出了一种基于偏振态相位编码的多用户量子密钥分发方案。以偏振编码作为地址码以区分用户,以相位编码携带信息,具有同时调制偏振态的相位和偏振角度的特点。建立了多用户量子信道模型,通过仿真获得其安全通信距离。结果表明,本文方案不但能够有效区分多用户通信中各用户信息,而且比基于偏振编码或相位编码的量子密钥分发方案更加安全。
A multi-user quantum key distribution scheme based on polarization phase encoding is proposed. Polarization coding as the address code to distinguish the user to carry the information phase coding, with the phase of the polarization state modulation and polarization characteristics. A multi-user quantum channel model is established, and its secure communication distance is obtained through simulation. The results show that this scheme not only can effectively distinguish the user information in multi-user communication, but also is more secure than the quantum key distribution scheme based on polarization coding or phase coding.