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Stanford physicists use photons to carry messages from electrons 1.2 miles apart.

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An important step towards showing the practicality of quantum networks:

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.

Quantum entanglement is the observed phenomenon of two or more particles that are connected, even over thousands of miles. If it sounds strange, take comfort knowing that Albert Einstein described this behavior as "spooky action."

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