Does the potential energy landscape of a supercooled liquid resemble a collection of traps?

Details Does the potential energy landscape of a supercooled liquid resemble a collection of traps? Does the potential energy landscape of a supercooled liquid resemble a collection of traps?

2005-03-09

arxiv.org/abs/cond-mat/0503211v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

14 pages, 12 figures

Scientific paper

10.1103/PhysRevE.72.021503

It is analyzed whether the potential energy landscape of a glass-forming system can be effectively mapped on a random model which is described in statistical terms. For this purpose we generalize the simple trap model of Bouchaud and coworkers by dividing the total system into M weakly interacting identical subsystems, each being described in terms of a trap model. The distribution of traps in this extended trap model (ETM) is fully determined by the thermodynamics of the glass-former. The dynamics is described by two adjustable parameters, one characterizing the common energy level of the barriers, the other the strength of the interaction. The comparison is performed for the standard binary mixture Lennard-Jones system with 65 particles. The metabasins, identified in our previous work, are chosen as traps. Comparing molecular dynamics simulations of the Lennard-Jones system with Monte Carlo calculations of the ETM allows one to determine the adjustable parameters. Analysis of the first moment of the waiting distribution yields an optimum agreement when choosing M=3 subsystems. Comparison with the second moment of the waiting time distribution, reflecting dynamic heterogeneities, indicates that the sizes of the subsystems may fluctuate.

Affiliated with

Also associated with

No associations

Rating

Does the potential energy landscape of a supercooled liquid resemble a collection of traps? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Does the potential energy landscape of a supercooled liquid resemble a collection of traps?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Does the potential energy landscape of a supercooled liquid resemble a collection of traps? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-369357