Activation of monogamy in non-locality using local contextuality

Abstract

A unified view on the phenomenon of monogamy exhibited by Bell inequalities and non-contextuality inequalities arising from the no-signaling and no-disturbance principles is presented using the graph-theoretic method introduced in \textit{Phys. Rev. Lett. 109, 050404 (2012)}. We propose a novel type of trade-off, namely Bell inequalities that do not exhibit monogamy features of their own can be activated to be monogamous by the addition of a local contextuality term. This is illustrated by means of the well-known ${\mathcal{I}}_{3322}$ inequality, and reveals a resource trade-off between bipartite correlations and the local purity of a single system. In the derivation of novel no-signaling monogamies, we uncover a new feature, namely that two-party Bell expressions that are trivially classically saturated can become non-trivial upon the addition of an expression involving a third party with a single measurement input.

8 pages, 4 figures

References in corpus (4)

• A simple test for hidden variables in spin-1 system
• Monogamy of Bell's inequality violations in non-signaling theories
• Monogamy Relation in No-disturbance Theories
• Maximum quantum nonlocality between systems that never interacted

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