论文标题
DPS-QKD中空间和时键的等效性
Equivalence of space and time-bins in DPS-QKD
论文作者
论文摘要
DPS-QKD中的关键产生效率和安全性随着路径延迟或时态叠加的增加而提高。我们使用时间键证明了超置状态的实现，并建立了基于路径的叠加的等效性，从而为差分相移量子键分布（DPS-qKD）提供了更简单的高阶叠加态实现。我们设置了超过105 km的单模式光纤的DPS-QKD，其量子位错误率小于15％，以2 kbps的安全密钥速率。凭借颞卫队，QBER降低到不到10％，但关键率降低了20％。
Key generation efficiency, and security, in DPS-QKD improve with an increase in the number of path delays or time-bin superpositions. We demonstrate the implementation of super-position states using time-bins, and establish an equivalence with path-based superposition, thus yielding a simpler implementation of higher-order superposition states for differential phase-shift quantum key distribution (DPS-QKD). We set up DPS-QKD, over 105 km of single mode optical fiber, with a quantum bit error rate of less than 15% at a secure key rate of 2 kbps. With temporal guard bands, the QBER reduced to less than 10%, but with a 20% reduction in the key rate.
