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arXiv · 1805.03861

Derivation of the spin-glass order parameter from stochastic thermodynamics

A. Crisanti·M. Picco·F. Ritort
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Abstract

A fluctuation relation is derived to extract the order parameter function $q(x)$ in weakly ergodic systems. The relation is based on measuring and classifying entropy production fluctuations according to the value of the overlap $q$ between configurations. For a fixed value of $q$, entropy production fluctuations are Gaussian distributed allowing us to derive the quasi-FDT so characteristic of aging systems. The theory is validated by extracting the $q(x)$ in various types of glassy models. It might be generally applicable to other nonequilibrium systems and experimental small systems.

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A. Crisanti, M. Picco, F. Ritort. 2018-05-10. Derivation of the spin-glass order parameter from stochastic thermodynamics. https://doi.org/10.1103/physreve.97.052103

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