Observational entropy from finite-resolution measurements diagnoses chaos and criticality in quantum systems, with derivatives locating exact critical points and entropy production rates reproducing classical Lyapunov exponents above a resolution threshold.
Husimi, Some formal properties of the density ma- trix, Proceedings of the Physico-Mathematical Society of Japan
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Probing Chaos and Criticality with Observational Entropy and Finite-Resolution Measurements
Observational entropy from finite-resolution measurements diagnoses chaos and criticality in quantum systems, with derivatives locating exact critical points and entropy production rates reproducing classical Lyapunov exponents above a resolution threshold.