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A One-Way Quantumness

  1. Apr 26, 2016 #1


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    Staff: Mentor

  2. jcsd
  3. Apr 26, 2016 #2


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    I think this is the full article (and note PF member Howard Wiseman as one of the authors - please correct me if wrong about that) :


    Sabine Wollmann, Nathan Walk, Adam J. Bennet, Howard M. Wiseman, G. J. Pryde

    Within the hierarchy of inseparable quantum correlations, Einstein-Podolsky-Rosen steering is distinguished from both entanglement and Bell nonlocality by its asymmetry -- there exist conditions where the steering phenomenon changes from being observable to not observable, simply by exchanging the role of the two measuring parties. Whilst this one-way steering feature has been previously demonstrated for the restricted class of Gaussian measurements, for the general case of positive-operator-valued measures even its theoretical existence has only recently been settled. Here, we prove, and then experimentally observe, the one-way steerability of an experimentally practical class of entangled states in this general setting. As well as its foundational significance, the demonstration of fundamentally asymmetric nonlocality also has practical implications for the distribution of the trust in quantum communication networks.
  4. Apr 26, 2016 #3


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    That is correct. The other article mentioned (Sun et al.) is also on arXiv: http://arxiv.org/abs/1511.01679
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