A Search for Fluctuation-Dissipation Theorem Violations in Spin-Glasses from Susceptibility Data

TL;DR

This paper introduces a method to investigate potential violations of the fluctuation-dissipation theorem in spin-glasses using existing susceptibility data, employing a dynamic Parisi-Toulouse approximation and Curie-Weiss analysis.

Contribution

It presents a novel indirect approach to study fluctuation-dissipation relations in spin-glasses solely from susceptibility measurements, extending theoretical models.

Findings

Analysis of experimental data shows no clear violation of the fluctuation-dissipation theorem.

The method provides a new tool for examining spin-glass dynamics.

Results support the validity of the fluctuation-dissipation relation in studied samples.

Abstract

We propose an indirect way of studying the fluctuation-dissipation relation in spin-glasses that only uses available susceptibility data. It is based on a dynamic extension of the Parisi-Toulouse approximation and a Curie-Weiss treatment of the average magnetic couplings. We present the results of the analysis of several sets of experimental data obtained from various samples.