Physicists set quantum record by using photons to carry messages from electrons almost 2 kilometers apart

Researchers from Stanford have advanced a long-standing problem in quantum physics – how to send "entangled" particles over long distances. Their work is described in the online edition of Nature Communications. Scientists and engineers are interested in the practical application of this technology to make quantum networks that can send highly secure information over long distances – a capability that also makes the technology appealing to governments, banks and militaries.

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