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quant-ph2026
Contextuality in Sequential State Discrimination
Nyan Raess, Farid Shahandeh
Generalized contextuality is known to be required in optimal strategies for quantum state discrimination protocols. More recently, sequential discrimination tasks have been studied…
quant-ph2026
Linear Algebra of Generalized Contextuality in All Prepare-Transform-Measure Scenarios
Theodoros Yianni, Nyan Raess, Farid Shahandeh
Generalized contextuality is a canonical distinguishing property of nonclassical generalized probabilistic theories, in particular quantum mechanics. Methods for certification and…
quant-ph2026
Sheaf-Theoretic Preparation Contextuality
Tom Williams, Mina Doosti, Farid Shahandeh
We introduce a preparation-dual notion of contextuality, formulated as an obstruction to stochastic extension. In parallel with the sheaf-theoretic formulation of measurement conte…