Steering, entanglement, nonlocality, and the Einstein-Podolsky-Rosen paradox.

@article{Wiseman2007SteeringEN,
  title={Steering, entanglement, nonlocality, and the Einstein-Podolsky-Rosen paradox.},
  author={Howard M. Wiseman and S. J. Jones and Andrew C. Doherty},
  journal={Physical review letters},
  year={2007},
  volume={98 14},
  pages={
          140402
        }
}
The concept of steering was introduced by Schrödinger in 1935 as a generalization of the Einstein-Podolsky-Rosen paradox for arbitrary pure bipartite entangled states and arbitrary measurements by one party. Until now, it has never been rigorously defined, so it has not been known (for example) what mixed states are steerable (that is, can be used to exhibit steering). We provide an operational definition, from which we prove (by considering Werner states and isotropic states) that steerable… 

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