Bound non-locality and activation

Abstract

We investigate non-locality distillation using measures of non-locality based on the Elitzur-Popescu-Rohrlich decomposition. For a certain number of copies of a given non-local correlation, we define two quantities of interest: (i) the non-local cost, and (ii) the distillable non-locality. We find that there exist correlations whose distillable non-locality is strictly smaller than their non-local cost. Thus non-locality displays a form of irreversibility which we term bound non-locality. Finally we show that non-local distillability can be activated.

4 pages, 1 figure

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• Quantum Correlations and Quantum Non-locality: a review and a few new ideas
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• Limitations on device independent key secure against non signaling adversary via the squashed non-locality
• Characterizing quantum correlations in the nonsignaling framework
• Quantum Nonlocal Boxes Exhibit Stronger Distillability
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• Bound on Bell Inequalities by Fraction of Determinism and Reverse Triangle Inequality
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• Threshold (Q, P) Quantum Distillation
• Contextuality, superlocality and nonclassicality of supernoncontextuality