Dynamical transition in the D = 3 Edwards-Anderson spin glass in an external magnetic field
Abstract
We study the off-equilibrium dynamics of the three-dimensional Ising spin glass in the presence of an external magnetic field. We have performed simulations both at fixed temperature and with an annealing protocol. Thanks to the Janus special-purpose computer, based on FPGAs, we have been able to reach times equivalent to 0.01 seconds in experiments. We have studied the system relaxation both for high and for low temperatures, clearly identifying a dynamical transition point. This dynamical temperature is strictly positive and depends on the external applied magnetic field. We discuss different possibilities for the underlying physics, which include a thermodynamical spin-glass transition, a mode-coupling crossover or an interpretation reminiscent of the random first-order picture of structural glasses.
Keywords
Cite
@article{arxiv.1307.4998,
title = {Dynamical transition in the D = 3 Edwards-Anderson spin glass in an external magnetic field},
author = {Janus Collaboration and M. Baity-Jesi and R. Alvarez Baños and A. Cruz and L. A. Fernandez and J. M. Gil-Narvion and Gordillo-Guerrero and D. Iñiguez and A. Maiorano and F. Mantovani and E. Marinari and V. Martin-Mayor and J. Monforte-Garcia and A. Muñoz Sudupe and D. Navarro and G. Parisi and S. Perez-Gaviro and M. Pivanti and F. Ricci-Tersenghi and J. J. Ruiz-Lorenzo and S. F. Schifano and B. Seoane and A. Tarancon and R. Tripiccione and D. Yllanes},
journal= {arXiv preprint arXiv:1307.4998},
year = {2014}
}
Comments
Version accepted in PRE. 23 pages, 23 figures