The UK has opened what it describes as the “world’s first commercial-grade quantum network” for testing. The secure network will test quantum key distribution (QKD). This uses the principles of quantum mechanics (that observation affects outcome) rather than mathematical complexity to secure cryptographic keys.
The 125-km optical fibre link is part of the UK Quantum Network (UKQN) project; a collaboration between research and industry supported by the UK’s National Quantum Technologies Programme. The new network runs from telecommunications giant’s BT’s Adastral Park research campus near Ipswich, to Cambridge.
Network to Carry Classical and Quantum Traffic