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.
4 pages. v2: Title and abstract changed, presentation improved, references updated, same results
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- Nonlocality activation in a photonic quantum network
- Thermodynamic Approach to Quantifying Incompatible Instruments
- Work extraction and fully entangled fraction
- On the Activation of Quantum Nonlocality
- Nonlocal biphoton generation in Werner state from a single semiconductor quantum dot
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- Fidelity of entanglement and quantum entropies: unveiling their relationship in quantum states and channels
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- On fully entangled fraction and quantum conditional entropies for states with maximally mixed marginals
- A resource theory of asynchronous quantum information processing