February 22, 2022

USTC Scientists Break Quantum Key Distribution Record Over 830-km Optical Fibers.

Quantum key distribution (QKD) is presently attracting immense research interest on the global level due to its revolutionary potential to enable information-theoretically secure communication. However, the wide applications of QKD are curtailed by the channel loss since the encoded photons cannot be amplified or relayed via classical optical techniques to keep its security, which limits the increase of key rate and distance of QKD.