All quantum states useful for teleportation are nonlocal resources
arXiv:1207.5485 · doi:10.1103/PhysRevA.87.042104
Abstract
Understanding the relation between the different forms of inseparability in quantum mechanics is a longstanding problem in the foundations of quantum theory and has implications for quantum information processing. Here we make progress in this direction by establishing a direct link between quantum teleportation and Bell nonlocality. In particular, we show that all entangled states which are useful for teleportation are nonlocal resources, i.e. lead to deterministic violation of Bell's inequality. Our result exploits the phenomenon of super-activation of quantum nonlocality, recently proved by Palazuelos, and suggests that the latter might in fact be generic.
arXiv comment4 pages. v2: Title and abstract changed, presentation improved, references updated, same results
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