We observe nonmonotonic aging and memory effects, two hallmarks of glassy dynamics, in
two disordered mechanical systems: crumpled thin sheets and elastic foams. Under fixed …

In glassy materials, aging proceeds at large times via thermal activation. We show that this
can lead to negative dynamical response functions and novel and well-defined violations of …

The statistics of noise emitted by ultrathin crumpled sheets is measured while they exhibit
logarithmic relaxations under load. We find that the logarithmic relaxation advanced via a …

A great variety of systems exhibit slow'glassy'dynamics [1]: glasses of all kinds, but also spin-
glasses and dipolar glasses [2, 3]. Another interesting class of systems is that of …

We show numerically that a three-dimensional model for structural glass displays aging,
rejuvenation, and memory effects when subjected to a temperature cycle. These effects …

Disordered and amorphous materials often retain memories of perturbations they have
experienced since preparation. Studying such memories is a gateway to understanding this …

We investigate aging in glassy systems based on a simple model, where a point in
configuration space performs thermally activated jumps between the minima of a random …

The dynamic behaviour of glassy materials displays strong nonequilibrium effects, such as
ageing in simple protocols, memory, rejuvenation and Kovacs effects in more elaborated …

We show that memory can be encoded in a model amorphous solid subjected to athermal
oscillatory shear deformations, and in an analogous spin model with disordered interactions …

We present a phenomenological model for the dynamics of disordered (complex) systems.
We postulate that the lifetimes of the many metastable states are distributed according to a …