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Non-local correlations and key distribution

Barrett, J (Universite Bruxelles Libre )
Wednesday 08 September 2004, 11:30-12:15

Seminar Room 2, Newton Institute Gatehouse


We present a quantum key distribution scheme that is secure even against eavesdroppers who can break the laws of quantum mechanics, as long as superluminal signalling is impossible. The scheme is based on violation of a Bell inequality, and its security stems from the fact that non-local correlations are monogamous, in analogy with the monogamy of entanglement.

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