论文标题
与参考框架无关的测量设备与独立量子键分布的有效诱饵态
Efficient decoy-states for the reference-frame-independent measurement-device-independent quantum key distribution
论文作者
论文摘要
与参考框架无关的测量设备与独立的量子密钥分布（RFI-MDI-QKD）是一种新颖的协议，它消除了对检测器侧的所有可能攻击，并且在源侧中消除了参考框架对齐的必要性。但是，由于统计波动，其性能可能会显着降低，因为更多参数，例如必须积累不匹配的基本事件的收率和错误率以监控安全性。在这项工作中，我们发现原始的诱饵态方法估计了这些产量，因为它忽略了不同基础之间的潜在关系。通过共同处理不同基础的处理参数，当考虑统计波动时，RFI-MDI-QKD的性能在秘密关键率和可实现的距离方面得到了极大的提高。我们的结果为实用的RFI-MDI-QKD铺平了途径。
Reference-frame-independent measurement-device-independent quantum key distribution (RFI-MDI-QKD) is a novel protocol which eliminates all possible attacks on detector side and necessity of reference-frame alignment in source sides. However, its performance may degrade notably due to statistical fluctuations, since more parameters, e.g. yields and error rates for mismatched-basis events, must be accumulated to monitor the security. In this work, we find that the original decoy-states method estimates these yields over pessimistically since it ignores the potential relations between different bases. Through processing parameters of different bases jointly, the performance of RFI-MDI-QKD is greatly improved in terms of secret key rate and achievable distance when statistical fluctuations are considered. Our results pave an avenue towards practical RFI-MDI-QKD.
