INRiM demonstrates a new technique for improving long-distance quantum key distribution in a real field
In the study “Coherent phase transfer for real-world twin-field quantum key distribution”, published on the Nature Communications, a team of INRiM researchers shows that coherent laser interferometry considerably improves the performances of quantum key distribution protocols in long-distance, real-world networks.
Quantum Key Distribution (QKD) protocols enable cryptographic keys to be shared between distant parties with an intrinsic security guaranteed by the laws of quantum mechanics. This is made possible by the transmission of single photons, the elementary particles of which light is made of.
The issue is particularly topical and the European Union, thanks to the OQTAVO project (in which INRiM is actively involved), aims to integrate quantum technologies for cryptography within specific services throughout the Union.
However, one of the main obstacles towards the realization of a long-reach quantum network is the “fragility” of quantum signals.
