Archive: https://archive.today/MxRXZ From the post: >>Quantum messages sent across a 254-km telecom network in Germany represent the first known report of coherent quantum communications using existing commercial telecommunication infrastructure. The demonstration, reported in Nature this week, suggests that quantum communications can be achieved in real-world conditions. Quantum networks have the potential to enable secure communications, such as a quantum internet; quantum key distribution is one example of a theoretically secure communication technique.