Coherent phase transfer for real-world twin-field quantum key distribution.

ABSTRACT: Quantum mechanics allows distribution of intrinsically secure encryption keys by optical means. Twin-field quantum key distribution is one of the most promising techniques for its implementation on long-distance fiber networks, but requires stabilizing the optical length of the communication channels between parties. In proof-of-principle experiments based on spooled fibers, this was achieved by interleaving the quantum communication with periodical stabilization frames. In this approach, longer duty cycles for the key streaming come at the cost of a looser control of channel length, and a successful key-transfer using this technique in real world remains a significant challenge. Using interferometry techniques derived from frequency metrology, we develop a solution for the simultaneous ke

SUBMITTER: Clivati C 

PROVIDER: S-EPMC8748954 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature