An international research team, led by QuTech, successfully demonstrated a network connection between quantum processors over metropolitan distances, a significant advancement towards a future quantum internet. The team developed independent nodes integrated with optical internet fiber, enabling a 25 km quantum link. Quantum computers connected between Delft and The Hague set a record for quantum entanglement distance. Overcoming challenges such as photon loss, the team utilized a photon-efficient protocol requiring precise stabilization of the fiber link. Collaboration between academia and industry was crucial for success. This milestone paves the way for future quantum networks, offering new communication and computing capabilities.
https://www.tudelft.nl/en/2024/tu-delft/a-rudimentary-quantum-network-link-between-dutch-cities