J. Phys. I France
Volume 5, Number 8, August 1995
Page(s) 941 - 947
DOI: 10.1051/jp1:1995174
J. Phys. I France 5 (1995) 941-947

Phase Space Diffusion and Low Temperature Aging

A. Barrat and M. Mézard

Laboratoire de Physique Théorique de l'Ecole Normale Supérieur, 24 rue Lhomond, 75231 Paris Cedex 05, France

(Received 18 April 1995, received in final form 22 May 1995, accepted 29 May 1995)

We study the dynamical evolution of a system with a phase space consisting of configurations with random energies. The dynamics we use is of Glauber type. It allows for some dynamical evolution and aging even at very low temperatures, through the search of configurations with lower energies. This simple model provides an example of a new type of mechanism for the aging effect.

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