From the 1 of 6 linked papers with an AI index.
6 papers
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…
Linear Algebra of Generalized Contextuality in All Prepare-Transform-Measure Scenarios
Theodoros Yianni, Nyan Raess, Farid Shahandeh
The paper extends a linear‑algebraic framework for detecting generalized contextuality to multi‑stage prepare‑transform‑measure scenarios, providing a decision procedure with analy…
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…
Contextuality of all optimal quantum cloning
Mina Doosti, Theodoros Yianni, Farid Shahandeh
Quantum contextuality is a key nonclassical feature underlying advantages in quantum computation and communication. We introduce a new method to study contextuality in quantum info…
A Unified Linear Algebraic Framework for Physical Models and Generalized Contextuality
Farid Shahandeh, Theodoros Yianni, Mina Doosti
We develop a bottom-up, statistics-first framework in which the full probabilistic content of an operational theory is encoded in its matrix of conditional outcome probabilities of…
Complexity of Contextuality
Theodoros Yianni, Farid Shahandeh
Generalized contextuality is a hallmark of nonclassical theories like quantum mechanics. Yet, three fundamental computational problems concerning its decidability and complexity re…