Quantum entanglement distribution over 24.4-km telecom fiber concurrently carrying 36 Tbps commercial classical data with >94% fidelity

https://www.eurekalert.org/news-releases/1137154

"shifts entangled photons into quieter O-band optical spectrum, leaving classical traffic undisturbed in C-band... precise ps-time synchronization across both remote network nodes enables real-time identification of matching entangled photon pairs amid the heavy background noise... this real-world achievement proves that secure quantum communication networks can directly leverage existing commercial telecommunications infrastructure without requiring costly, dedicated fiber-optic builds"