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Open Quantum Systems Decoherence Quantum Foundations

On Contextuality as a Feature of Logic and Probability Theory

arXiv

Authors: Ask Ellingsen

Year

2026

Paper ID

28409

Status

Preprint

Abstract Read

~2 min

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Abstract

In quantum mechanics, not everything that can be observed can be observed simultaneously. Observational data exhibits contextuality - a generalisation of nonlocality - if the result of an observation is necessarily dependent on which combination of observables was measured. This article gives a mathematical introduction to contextuality, emphasising its nature as a general feature of probability theory and logic, rather than of any particular quantum theory.

Why This Paper Matters

This paper contributes to the Quantum Foundations research area in the Quantum Articles archive.
It adds a 2026 reference point for readers tracking recent quantum research.
In quantum mechanics, not everything that can be observed can be observed simultaneously.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.11857 [2] arXiv https://arxiv.org/abs/2603.11857 [3] Publisher https://arxiv.org/abs/2603.11857

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