All quantum states useful for teleportation are nonlocal resources

Daniel Cavalcanti, Antonio Acín, Nicolas Brunner, Tamás Vértesi

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

Understanding the relation between the different forms of inseparability in quantum mechanics is a longstanding problem in the foundations of quantum theory and has implications for quantum information processing. Here we make progress in this direction by establishing a direct link between quantum teleportation and Bell nonlocality. In particular, we show that all entangled states which are useful for teleportation are nonlocal resources, i.e., lead to deterministic violation of Bell's inequality. Our result also extends the phenomenon of superactivation of quantum nonlocality, recently proven by C. Palazuelos, and suggests that the latter might in fact be more general than initially thought.

Original languageEnglish
Article number042104
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume87
Issue number4
DOIs
Publication statusPublished - Apr 8 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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