In this paper, we propose a round robin differential quadrature phase shift quantum key distribution by using one decoy state and odd coherent states (RRDQPS-QKD-OCS). By comparing existing RRDPS-QKD and RRDQPS-QKD, our proposed protocol, RRDQPS-QKD-OCS, has an outstanding performance, where not only the key generation rate is much larger but also the maximum transmission distance is much longer. Additionally, a one decoy state method is sufficient for RRDQPS-QKD-OCS to be close to the asymptotic limit performance with RRDQPS-QKD-OCS by using infinite decoy states.

中文翻译：

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奇相干态的循环差分正交相移量子密钥分配

在本文中，我们通过使用一个诱饵态和奇数相干态（RRDQPS-QKD-OCS）提出了一种轮循差分正交相移量子密钥分配方法。通过比较现有的RRDPS-QKD和RRDQPS-QKD，我们提出的协议RRDQPS-QKD-OCS具有出色的性能，不仅密钥生成速率大得多，而且最大传输距离也更长。此外，通过使用无限的诱饵状态，一种诱饵状态方法足以使RRDQPS-QKD-OCS接近RRDQPS-QKD-OCS的渐近极限性能。