Perfect Quantum Privacy Implies Nonlocality
Tue, 2010-06-08 09:50 - Donatella Rosetti
Date:
2010-06-07
Reference:
R. Augusiak, D. Cavalcanti, G. Prettico, and A. Acin
Phys. Rev. Lett. 104, 230401 (2010)
Perfect states are those quantum states from which a perfectly secure cryptographic key can be extracted. They present 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 connection between perfect privacy and non-locality in the quantum domain.
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