论文标题
量子密钥分布网络的动态路由
Dynamic Routing for Quantum Key Distribution Networks
论文作者
论文摘要
在本文中，我们考虑具有量子中继器和少量值得信赖的节点的量子网络中的量子密钥分布（QKD）。与当前只有受信任节点的QKD网络和只有量子中继器的真实量子互联网，此类网络代表了中间立场，是近乎未来的QKD网络。在这种情况下，QKD可以有效，实际上部署，同时为未来的真实量子互联网提供见解。为了显着提高此类网络的关键发电效率，我们制定了一种新的动态路由策略，该策略根据当前的网络状态做出路由决策，并评估各种经典/量子的后处理技术。使用模拟，我们表明，在具有不对称信任节点放置的设置中，我们的动态路由策略可以显着提高两个用户之间的关键率。在高噪声方案中，后处理技术还可以提高关键率。此外，将动态路由策略与后处理技术相结合可以进一步改善QKD网络的整体性能。
In this paper, we consider quantum key distribution (QKD) in a quantum network with both quantum repeaters and a small number of trusted nodes. In contrast to current QKD networks with only trusted nodes and the true Quantum Internet with only quantum repeaters, such networks represent a middle ground, serving as near-future QKD networks. In this setting, QKD can be efficiently and practically deployed, while providing insights for the future true Quantum Internet. To significantly improve the key generation efficiency in such networks, we develop a new dynamic routing strategy that makes routing decisions based on the current network state, as well as evaluate various classical/quantum post-processing techniques. Using simulations, we show that our dynamic routing strategy can improve the key rate between two users significantly in settings with asymmetric trusted node placement. The post-processing techniques can also increase key rates in high noise scenarios. Furthermore, combining the dynamic routing strategy with the post-processing techniques can further improve the overall performance of the QKD network.
