Perfect Quantum Privacy Implies Nonlocality

Details Perfect Quantum Privacy Implies Nonlocality Perfect Quantum Privacy Implies Nonlocality

2009-11-17

arxiv.org/abs/0911.3274v3

Physical Review Letters 104, 230401 (2010)

Physics

Quantum Physics

4 pages, published version

Scientific paper

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 connection between perfect privacy
and nonlocality in the quantum domain.

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