,
Şerban-Ion Cercelescu,
Carmen-Maria Constantin
Creative Commons Attribution 4.0 International license
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.
@InProceedings{abramsky_et_al:LIPIcs.FSCD.2024.28,
author = {Abramsky, Samson and Cercelescu, \c{S}erban-Ion and Constantin, Carmen-Maria},
title = {{Commutation Groups and State-Independent Contextuality}},
booktitle = {9th International Conference on Formal Structures for Computation and Deduction (FSCD 2024)},
pages = {28:1--28:20},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-95977-323-2},
ISSN = {1868-8969},
year = {2024},
volume = {299},
editor = {Rehof, Jakob},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.FSCD.2024.28},
URN = {urn:nbn:de:0030-drops-203572},
doi = {10.4230/LIPIcs.FSCD.2024.28},
annote = {Keywords: Contextuality, state-independence, quantum mechanics, Pauli group, group presentations, unitary representations}
}