Field test of continuous-variable quantum key distribution with a true local oscillator
Brian P. Williams, Bing Qi, Muneer Alshowkan, Philip G. Evans, Nicholas A. Peters · Physical Review Applied · 2024
In quantum secure communication, continuous-variable quantum key distribution (CV-QKD) using a true local oscillator (LO) located at the receiver has been proposed to remove side-channel-attack vulnerabilities and reduce excess noise, but implementations have been confined to the lab. The authors demonstrate CV-QKD with a receiver-based true LO over a deployed fiber network, with coexistent classical communications. This represents a substantial technical and engineering advance over prior tabletop demonstrations.