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331 Quantum Messages Travel 254 km Using Existing Infrastructure For the First Time

Slashdot
BeauHD @ Slashdot · 04/24/2025 03:00 EDT

Quantum Messages Travel 254 km Using Existing Infrastructure For the First Time

Researchers in Germany successfully demonstrated coherent quantum communications over 254 km of existing commercial telecom fiber, marking the first real-world deployment of such a system without cryogenic cooling. Phys.Org reports: Their system uses a coherence-based twin-field quantum key distribution, which facilitates the distribution of secure information over long distances. The quantum communications network was deployed over three telecommunication data centers in Germany (Frankfurt, Kehl and Kirchf

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