Perfect quantum privacy implies nonlocality

Article, Preprint English OPEN
Augusiak, Remigiusz; Cavalcanti, Daniel; Prettico, Giuseppe; Acín, Antonio; (2010)
  • Journal: Phys. Rev. Lett. 104, 230401 (2010) (issn: 0031-9007, eissn: 1079-7114)
  • Related identifiers: doi: 10.1103/PhysRevLett.104.230401
  • Subject: Quantum Physics
    arxiv: Computer Science::Cryptography and Security | Computer Science::Databases
    acm: ComputerSystemsOrganization_MISCELLANEOUS

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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