Saddles and dynamics in a solvable mean-field model

Details Saddles and dynamics in a solvable mean-field model Saddles and dynamics in a solvable mean-field model

2002-12-04

arxiv.org/abs/cond-mat/0212098v1

J. Chem. Phys. 118, 8301 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

7 pages, 8 figures

Scientific paper

10.1063/1.1565996

We use the saddle-approach, recently introduced in the numerical investigation of simple model liquids, in the analysis of a mean-field solvable system. The investigated system is the k-trigonometric model, a k-body interaction mean field system, that generalizes the trigonometric model introduced by Madan and Keyes [J. Chem. Phys. 98, 3342 (1993)] and that has been recently introduced to investigate the relationship between thermodynamics and topology of the configuration space. We find a close relationship between the properties of saddles (stationary points of the potential energy surface) visited by the system and the dynamics. In particular the temperature dependence of saddle order follows that of the diffusivity, both having an Arrhenius behavior at low temperature and a similar shape in the whole temperature range. Our results confirm the general usefulness of the saddle-approach in the interpretation of dynamical processes taking place in interacting systems.

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