Model reproduces systems with aging-dependent relaxations

摘要

Researchers commonly use simple exponential functions to describe how physical systems decay to an equilibrium state. But in some cases, such as when a stretched rubber band is released or an electrical current decays in a superconductor, relaxations oc: cur slowly and follow logarithmic trajectories that depend on how long the material was sustained in the initial perturbed state. In Yoseph Imry's inaugural article, Ariel Amir et al. (pp. 1850-1855) discuss generic physical mechanisms that explain the role of this initial perturbation, known as "aging," and propose a mathematical model that predicts logarithmic relaxations for a variety of physical systems.