Optimal inequalities for state-independent contextuality
Abstract
Contextuality is a natural generalization of nonlocality which does not need composite systems or spacelike separation and offers a wider spectrum of interesting phenomena. Most notably, in quantum mechanics there exist scenarios where the contextual behavior is independent of the quantum state. We show that the quest for an optimal inequality separating quantum from classical noncontextual correlations in an state-independent manner admits an exact solution, as it can be formulated as a linear program. We introduce the noncontextuality polytope as a generalization of the locality polytope, and apply our method to identify two different tight optimal inequalities for the most fundamental quantum scenario with state-independent contextuality.
Cite
@article{arxiv.1204.3741,
title = {Optimal inequalities for state-independent contextuality},
author = {Matthias Kleinmann and Costantino Budroni and Jan-Åke Larsson and Otfried Gühne and Adan Cabello},
journal= {arXiv preprint arXiv:1204.3741},
year = {2022}
}
Comments
REVTeX4.1, 5 pages, 1 figure; v2: improved presentation and significantly extended results