Perfect quantum privacy implies nonlocality

Article, Preprint English OPEN
Augusiak, Remigiusz; Cavalcanti, Daniel; Prettico, Giuseppe; Acin, Antonio;
(2009)

Private states are those quantum states from which a perfectly secure cryptographic key can be extracted. They represent the basic unit of quantum privacy. In this work we show that all states belonging to this class violate a Bell inequality. This result establishes a ... View more
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