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arXiv · 2306.11519

Symmetries and Wigner representations of operational theories

Ties-A. Ohst·Martin Plávala
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Abstract

We develop the theory of Wigner representations for general probabilistic theories (GPTs), a large class of operational theories that include both classical and quantum theory. The Wigner representations that we introduce are a natural way to describe the theory in terms of some fixed observables; these observables are often picked to be position and momentum or spin observables. This allows us to introduce symmetries which transform the outcomes of the observables used to construct the Wigner representation; we obtain several results for when these symmetries are well defined or when they uniquely specify the Wigner representation.

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Ties-A. Ohst, Martin Plávala. 2023-06-20. Symmetries and Wigner representations of operational theories. https://doi.org/10.1088/1751-8121/ad8198

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