Scalable High-Rate Twin-Field Quantum Key Distribution Networks without Constraint of Probability and Intensity. (arXiv:2112.11165v2 [quant-ph] UPDATED)

Implementation of a twin-field quantum key distribution network faces
limitations, including the low tolerance of interference errors for
phase-matching type protocols and the strict constraint regarding intensity and
probability for sending-or-not-sending type protocols. Here, we propose a
two-photon twin-field quantum key distribution protocol inspired by
multiplexing in quantum repeaters. We achieve twin-field-type two-photon
interference through post-matching phase-correlated single-photon interference
events. We exploit the non-interference mode as the code mode to highly
tolerate interference errors, and the two-photon interference naturally removes …

distribution key networks quantum quantum key distribution rate