United KingdomIn early 2025, researchers successfully transmitted entangled photons through a fiber-optic network in the Maryland suburbs, marking progress toward establishing a quantum network. This achievement was reported by the National Institute of Standards and Technology (NIST) and published in the Journal of Optical Communications and Networking. Quantum networks rely on entanglement, a phenomenon where particles remain connected despite physical separation, to enable secure communication, enhanced sensing, and powerful computing capabilities. The experiment tested whether quantum networks could operate using existing fiber-optic infrastructure rather than requiring dedicated systems. However, the current setup faces challenges due to environmental factors affecting photon transmission.
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