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Numerical evidences of universal trap-like aging dynamics

Research output: Contribution to journalArticlepeer-review

Chiara Cammarota, Enzo Marinari

Original languageEnglish
Article number043303
Number of pages25
JournalJournal of Statistical Mechanics (JSTAT)
Volume2018
DOIs
Accepted/In press2 Mar 2018
Published5 Apr 2018

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Abstract

Trap models have been initially proposed as toy models for dynamical relaxation in extremely simplified rough potential energy landscapes. Their importance has recently grown considerably thanks to the discovery that the trap-like aging mechanism directly controls the out-of-equilibrium relaxation processes of more sophisticated spin models, that are considered as the solvable counterpart of real disordered systems. Further establishing the connection between these spin models, out-of-equilibrium behavior and the trap like aging mechanism could shed new light on the properties, which are still largely mysterious, for the activated out-of-equilibrium dynamics of disordered systems. In this work we discuss numerical evidence based on the computations of the permanence times of an emergent trap-like aging behavior in a variety of very simple disordered models—developed from the trap model paradigm. Our numerical results are backed by analytic derivations and heuristic discussions. Such exploration reveals some of the tricks needed to reveal the trap behavior in spite of the occurrence of secondary processes, of the existence of dynamical correlations and of strong finite system's size effects.

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