Experimental Twin-Field Quantum Key Distribution over 1000 km Fiber Distance

Experimental Twin-Field Quantum Key Distribution over 1000 km Fiber Distance Quantum key distribution (QKD) aims to generate secure private keys shared by two remote parties. With its security being protected by principles of quantum mechanics, some technology challenges remain towards practical application of QKD. The major one is the distance limit, which is caused by the fact that a quantum signal cannot be amplified while the channel loss is exponential with the distance for photon transmis...