Fig. 2: Pictorial representation of the sets of correlations in Bell scenarios.
From: Post-quantum steering is a stronger-than-quantum resource for information processing
The polytope of classical (Local Hidden State) correlations is depicted by the grey triangle. The convex set of quantum correlations is depicted by the red-bordered convex region. The set of Witworld correlations is depicted by the green transparent region. The polytope of no-signalling correlations is depicted by the black-bordered pentagon. The sets of no-signalling and Witworld correlations are equivalent. Witworld correlations strictly contain the quantum set, which strictly contains the classical set.
