Topological optimization of quantum key distribution networks

Understand

A Quantum Key Distribution (QKD) network is an infrastructure that allows the realization of the key distribution cryptographic primitive over long distances and at high rates with information-theoretic security.

• In this work, we consider QKD networks based on trusted repeaters from a topology viewpoint, and present a set of analytical models that can be used to optimize the spatial distribution of QKD devices and nodes in specific network configurations in order to guarantee a certain level of service to network users, at a minimum cost.
• We give details on new methods and original results regarding such cost minimization arguments applied to QKD networks.
• These results are likely to become of high importance when the deployment of QKD networks will be addressed by future quantum telecommunication operators.