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Skirting around ol' Wernie Heisenberg and that Principle of his, the team exploited quantum entanglement to read the encryption keys encoded in photon polarizations from their momentums, avoiding detection by either end -- in other words, doing what was once thought impossible by cryptographers.
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Not only that, but, also in principle, it could be done without resorting to the complexities of quantum entanglement.
CNN: Beam me up: Just how close are we to teleportation?
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In a new paper published last week in Physical Review Letters, researchers at the Niels Bohr Institute have published a method that allows for much more stable quantum entanglement, which may help pave the way for better quantum communication and quantum computing.
FORBES: New Technique Could Pave the Way for Quantum Information Networks