davemark, 
"Experiments generate quantum entanglement over optical fibres across three real cities"
Quantum Entanglement, where 2 particles are connected and affect one another even if those particles are light-years apart.
The demo used existing fiber cable, proof of concept that quantum entanglement can work in existing network
One experiment, in Boston, used fiber that crossed the Charles River 6 times
Huge leap forward!
https://www.nature.com/articles/d41586-024-01445-2
#Science #Physics
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