# Aging in glassy systems: new experiments, simple models, and open questions

@inproceedings{Bouchaud1999AgingIG,
title={Aging in glassy systems: new experiments, simple models, and open questions},
author={Jean-Philippe Bouchaud},
year={1999}
}
We review the most striking experimental results on aging in a variety of disordered systems, which reveal similar features but also important differences. We argue that a generic model that reproduce many of these features is that of {\it pinned defects} in a disordered environment, hopping between different metastable states. The fact that energy barriers grow with the size of the reconforming regions immediately leads to a strong hierarchy of time scales. In particular, long wavelength… CONTINUE READING

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