论文标题
使用简单的相误差公式保护BB84型量子键分布
Secure BB84-type quantum key distribution with simple phase error formula
论文作者
论文摘要
由于需要四个状态的准备和测量，因此基于BB84的量子密钥分布系统受到高速和芯片整合的限制。最近，只有三个状态准备和测量的简化BB84协议显示了标准BB84的近似秘密关键率。但是，安全证明仅在集体攻击下有效，需要与基础无关的检测效率条件。在这里，我们提供了针对连贯攻击的安全证明，该攻击同时消除了与基础无关的检测效率条件。重要的是，通过微妙的观察，相误率公式非常简单。我们预计，具有诱饵方法的简化BB84协议可以在现实中广泛实施。
BB84-based quantum key distribution system is limited in high speed and chip integration due to the requirement of four states preparation and measurement. Recently, the simplified BB84 protocol with only three states preparation and measurement has showed the approximate secret key rate with standard BB84. However, the security proof is only valid under the collective attack and requires the basis-independent detection efficiency condition. Here, we provide a security proof against the coherent attack, which simultaneously removes the basis-independent detection efficiency condition. Importantly, the phase error rate formula is quite simple through a subtle observation. We expect that the simplified BB84 protocol with decoy-state method can be widely implemented in reality.
