One-way Einstein-Podolsky-Rosen steering

Joseph Bowles, Tamás Vértesi, Marco Túlio Quintino, Nicolas Brunner

Research output: Contribution to journalArticle

144 Citations (Scopus)

Abstract

Einstein-Podolsky-Rosen steering is a form of quantum nonlocality exhibiting an inherent asymmetry between the observers, Alice and Bob. A natural question is then whether there exist entangled states which are one-way steerable, that is, Alice can steer Bob's state, but it is impossible for Bob to steer the state of Alice. So far, such a phenomenon has been demonstrated for continuous variable systems, but with a strong restriction on allowed measurements, namely, considering only Gaussian measurements. Here we present a simple class of entangled two-qubit states which are one-way steerable, considering arbitrary projective measurements. This shows that the nonlocal properties of entangled states can be fundamentally asymmetrical.

Original languageEnglish
Article number200402
JournalPhysical review letters
Volume112
Issue number20
DOIs
Publication statusPublished - May 22 2014

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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