Temperature chaos is present in off-equilibrium spin-glass dynamics
Marco Baity‐Jesi, Enrico Calore, A. Cruz, L. A. Fernández, J. M. Gil-Narvion, I. González-Adalid Pemartín, A. Gordillo-Guerrero, D. Íñiguez, A. Maiorano, Enzo Marinari, V. Martı́n-Mayor, J. Moreno-Gordo, A. Muñoz Sudupe, D. Navarro, I. Paga, Giorgio Parisi, S. Pérez-Gaviro, Federico Ricci‐Tersenghi, J. J. Ruiz-Lorenzo, Sebastiano Fabio Schifano, Beatriz Seoane, A. Tarancón, R. Tripiccione, David Yllanes
Abstract
Abstract Experiments featuring non-equilibrium glassy dynamics under temperature changes still await interpretation. There is a widespread feeling that temperature chaos (an extreme sensitivity of the glass to temperature changes) should play a major role but, up to now, this phenomenon has been investigated solely under equilibrium conditions. In fact, the very existence of a chaotic effect in the non-equilibrium dynamics is yet to be established. In this article, we tackle this problem through a large simulation of the 3D Edwards-Anderson model, carried out on the Janus II supercomputer. We find a dynamic effect that closely parallels equilibrium temperature chaos. This dynamic temperature-chaos effect is spatially heterogeneous to a large degree and turns out to be controlled by the spin-glass coherence length ξ . Indeed, an emerging length-scale ξ * rules the crossover from weak (at ξ ≪ ξ * ) to strong chaos ( ξ ≫ ξ * ). Extrapolations of ξ * to relevant experimental conditions are provided.