Aging, memory and rejuvenation: some lessons from simple models

TL;DR

This paper demonstrates that memory and rejuvenation phenomena observed in complex glassy systems can also be seen in simple models like 2D ferromagnets through numerical simulations, providing insights into off-equilibrium dynamics.

Contribution

The study shows that simple models can exhibit complex aging, memory, and rejuvenation effects, challenging the notion that such phenomena require intricate systems.

Findings

Memory and rejuvenation effects observed in simple 2D ferromagnets.

Numerical simulations reveal off-equilibrium dynamics similar to glassy systems.

Critical discussion of existing literature in light of new results.

Abstract

Many recent experiments probed the off equilibrium dynamics of spin glasses and other glassy systems through temperature cycling protocols and observed memory and rejuvenation phenomena. Here we show through numerical simulations, using powerful algorithms, that such features can already be observed to some extent in simple models such as two dimensional ferromagnets. We critically discuss these results and review some aspects of the literature in the light of our findings.