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Commutation Groups and State-Independent Contextuality

arXiv
Authors: Samson Abramsky, Serban-Ion Cercelescu, Carmen-Maria Constantin

Year

2026

Paper ID

28381

Status

Preprint

Abstract Read

~2 min

Abstract Words

110

Citations

N/A

Abstract

We introduce an algebraic structure for studying state-independent contextuality arguments, a key form of quantum non-classicality exemplified by the well-known Peres-Mermin magic square, and used as a source of quantum advantage. We introduce commutation groups presented by generators and relations, and analyse them in terms of a string rewriting system. There is also a linear algebraic construction, a directed version of the Heisenberg group. We introduce contextual words as a general form of contextuality witness. We characterise when contextual words can arise in commutation groups, and explicitly construct non-contextual value assignments in other cases. We give unitary representations of commutation groups as subgroups of generalized Pauli n-groups.

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  • We introduce an algebraic structure for studying state-independent contextuality arguments, a key form of quantum non-classicality exemplified by the well-known Peres-Mermin...

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