Scalable high-rate twin-field quantum key distribution networks without constraint of probability and intensity

Implementation of a twin-field quantum key distribution network faces limitations, including the low tolerance interference errors for phase-matching-type protocols and strict constraint regarding intensity probability sending-or-not-sending-type protocols. Here we propose two-photon protocol achieve twin-field-type through postmatching phase-correlated single-photon events. We exploit noninterference mode as code to highly tolerate naturally removes constraint. Therefore, our can transcend above-mentioned limitations while breaking secret capacity repeaterless distribution. Simulations show that four-user network, under which each node with fixed system parameters dynamically switch different attenuation links, rates all six links either exceed or approach capacity. However, are lower than when using Additionally, four could not extract anticipate facilitate development practical efficient networks.