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gauge invariance 1hyperdensity functional theory 1quantum many-body systems 1sum rules 1superoperator 1

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20242026
most citedMetadensity functional learning for classical fluids: Regularizing with pair correlations

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quant-ph2026

Quantum statistical mechanical gauge invariance

Johanna Müller, Matthias Schmidt

The paper introduces a quantum shifting superoperator to describe gauge transformations in quantum many‑body statistical mechanics, deriving exact equilibrium sum rules that link l…