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Chromatic Quantum Contextuality

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arxiv 2501.15261 v3 pith:PZIU6VEM submitted 2025-01-25 quant-ph

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keywords quantumchromaticcontextualityoutcomescannotclassicalconstraintscontext
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abstract

Chromatic quantum contextuality is a criterion of quantum nonclassicality based on (hyper)graph coloring constraints. If a quantum hypergraph requires more colors than the number of outcomes per maximal observable (context), it lacks a classical realization with n-uniform outcomes per context. Consequently, it cannot represent a "completable" non-contextual set of coexisting n-ary outcomes per maximal observable. This result serves as a chromatic analogue of the Kochen-Specker theorem. We present an explicit example of a four-colorable quantum logic in dimension three. Furthermore, chromatic contextuality suggests a novel restriction on classical truth values, thereby excluding two-valued measures that cannot be extended to $n$-ary colorings. Using this framework, we establish new bounds for the house, pentagon, and pentagram hypergraphs, refining previous constraints.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Chromatic Completeness and the Independence of Geometric Obstruction

    quant-ph 2026-07 accept novelty 7.0 of 10

    Strong chromatic number exceeding dimension blocks only chromatic completeness, not faithful orthogonal ray representations; completed Yu–Oh has χ=4 with an R³ FOR while Greechie G₃₂ has χ=4 with none in C³.

  2. Which Classicality? Incidence, Simplex, and Product-Rule Tests in Finite Quantum Logics

    quant-ph 2026-07 accept novelty 6.0 of 10

    Classicality of finite quantum logics is bookkeeping-dependent: incidence, simplex-embedding, and product-rule tests diagnose different retained structures, with GHZ classical as one Boolean context and fragment-speci...

  3. Construction of Kochen-Specker Sets from Mutually Unbiased Bases

    quant-ph 2025-09 conditional novelty 6.0 of 10

    A systematic MUB-based enumeration yields a 69-ray 50-context KS nucleus unifying known constructions, plus forcing gadgets in D=4 and D=5 that enforce maximal unbiasedness.

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