Inequivalence of entanglement, steering, and Bell nonlocality for general measurements
arXiv:1501.03332 · doi:10.1103/PhysRevA.92.032107
Abstract
Einstein-Podolsky-Rosen steering is a form of inseparability in quantum theory commonly acknowledged to be intermediate between entanglement and Bell nonlocality. However, this statement has so far only been proven for a restricted class of measurements, namely projective measurements. Here we prove that entanglement, one-way steering, two-way steering and nonlocality are genuinely different considering general measurements, i.e. single round positive-operator-valued-measures. Finally, we show that the use of sequences of measurements is relevant for steering tests, as they can be used to reveal "hidden steering".
Typo in equation 13 corrected (noticed by Jessica Bavaresco)
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