## Operationally meaningful representations of physical systems in neural networks

2022
##### Authors
Poulsen Nautrup, Hendrik
Metger, Tony
Iten, Raban
Jerbi, Sofiene
Trenkwalder, Lea M.
Wilming, Henrik
Renner, Renato
Journal article
Published
##### Published in
Machine Learning: Science and Technology ; 3 (2022), 4. - 045025. - IOP Publishing. - eISSN 2632-2153
##### Abstract
To make progress in science, we often build abstract representations of physical systems that meaningfully encode information about the systems. Such representations ignore redundant features and treat parameters such as velocity and position separately because they can be useful for making statements about different experimental settings. Here, we capture this notion by formally defining the concept of operationally meaningful representations. We present an autoencoder architecture with attention mechanism that can generate such representations and demonstrate it on examples involving both classical and quantum physics. For instance, our architecture finds a compact representation of an arbitrary two-qubit system that separates local parameters from parameters describing quantum correlations.
100 Philosophy
##### Keywords
representation learning, neural networks, reinforcement learning, Bloch vector, quantum physics
##### Cite This
ISO 690POULSEN NAUTRUP, Hendrik, Tony METGER, Raban ITEN, Sofiene JERBI, Lea M. TRENKWALDER, Henrik WILMING, Hans J. BRIEGEL, Renato RENNER, 2022. Operationally meaningful representations of physical systems in neural networks. In: Machine Learning: Science and Technology. IOP Publishing. 3(4), 045025. eISSN 2632-2153. Available under: doi: 10.1088/2632-2153/ac9ae8
BibTex
@article{PoulsenNautrup2022Opera-59643,
year={2022},
doi={10.1088/2632-2153/ac9ae8},
title={Operationally meaningful representations of physical systems in neural networks},
number={4},
volume={3},
journal={Machine Learning: Science and Technology},
author={Poulsen Nautrup, Hendrik and Metger, Tony and Iten, Raban and Jerbi, Sofiene and Trenkwalder, Lea M. and Wilming, Henrik and Briegel, Hans J. and Renner, Renato},
note={Article Number: 045025}
}

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