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One-way Einstein-Podolsky-Rosen Steering

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Vértesi, Tamás
Published in Physical Review Letters. 2014, vol. 112, no. 20, p. 200402
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.
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BOWLES, Joseph et al. One-way Einstein-Podolsky-Rosen Steering. In: Physical Review Letters, 2014, vol. 112, n° 20, p. 200402. https://archive-ouverte.unige.ch/unige:40676

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Deposited on : 2014-10-03

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