Topological Description of the Aging Dynamics in Simple Glasses

Details Topological Description of the Aging Dynamics in Simple Glasses Topological Description of the Aging Dynamics in Simple Glasses

2000-11-30

arxiv.org/abs/cond-mat/0011519v2

Phys. Rev. Lett. 87, 055502 (2001)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 5 postscript figures

Scientific paper

10.1103/PhysRevLett.87.055502

We numerically investigate the aging dynamics of a monatomic Lennard-Jones glass, focusing on the topology of the potential energy landscape which, to this aim, has been partitioned in basins of attraction of stationary points (saddles and minima). The analysis of the stationary points visited during the aging dynamics shows the existence of two distinct regimes: i) at short times, tt_c, the system mainly lies in basins pertaining to minima of slowly decreasing energy. The dynamics for t>t_c can be represented by a simple random walk on a network of minima with a jump probability proportional to the inverse of the waiting time.

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