Volume 59, Number 5, September 2002
|Page(s)||642 - 647|
|Published online||01 September 2002|
Equilibrium distribution of the inherent states and their dynamics in glassy systems and granular media
Dipartimento di Fisica, Università
“Federico II”, INFM and INFN Napoli Via Cintia,
80126 Napoli, Italy
2 Department of Mathematics, Imperial College - London, SW7 2BZ, UK
Accepted: 5 June 2002
The present paper proposes a Statistical Mechanics approach to the inherent states of glassy systems and granular materials, following the original ideas developed by Edwards for granular materials. Two lattice models, a diluted spin glass and a system of hard spheres under gravity, introduced in the context of glassy systems and granular materials, are evolved using a “tap dynamics” analogous to that of experiments on granular materials. The asymptotic macrostates, reached by the system, are shown to be described by a single thermodynamical parameter, and this parameter to coincide with the temperature, called the “configurational temperature”, predicted assuming that the distribution among the inherent states satisfies the principle of maximum entropy.
PACS: 05.20.-y – Classical statistical mechanics / 75.10.Nr – Spin-glass and other random models / 81.05.Rm – Porous materials; granular materials
© EDP Sciences, 2002
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