The Quad-C5 graph, built from four overlapping KCBS pentagons, is the maximum-gap contextuality witness on eight vertices and is already contextual for a single qutrit.
Experimental non-classicality of an indivisible quantum system.Nature, 474(7352):490– 493
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Depolarizing channels suppress the correlations needed to witness both state-dependent and state-independent contextuality in sequential KCBS and Peres-Mermin implementations, leading to classicalization.
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The Quad-$C_5$ Graph: Maximum Contextuality Gap on Eight Vertices
The Quad-C5 graph, built from four overlapping KCBS pentagons, is the maximum-gap contextuality witness on eight vertices and is already contextual for a single qutrit.
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How Quantum Contextuality disappears in the Classical Limit
Depolarizing channels suppress the correlations needed to witness both state-dependent and state-independent contextuality in sequential KCBS and Peres-Mermin implementations, leading to classicalization.