Quantum effect that could secure communications holds over distance

Wednesday, 13 June 2007, 3:03 AM EST

European researchers said Tuesday they have proved an effect in quantum physics works over long distances, which means it could one day be used to make electronic communications infallibly secure.

Scientists at the European Space Agency said they found that the properties of quantum entanglement — a state in which two light particles or photons' states become linked after they interact with each other — is maintained even when the photons are as far as 144 kilometres apart and must travel through the atmosphere, into space and back.

At CBC.

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