A New Method to Compute the Configurational Entropy in Spin Glasses

Details A New Method to Compute the Configurational Entropy in Spin Glasses A New Method to Compute the Configurational Entropy in Spin Glasses

2001-05-21

arxiv.org/abs/cond-mat/0105391v4

Physics

Condensed Matter

Disordered Systems and Neural Networks

14 pages, 3 figures, LaTeX2e with EJP class. EPJ B (in press)

Scientific paper

We propose a new method to compute the configurational entropy of glassy systems as a function of the free energy of valleys at a given temperature, in the framework of the Stillinger and Weber approach. In this method, which we call free-energy inherent structures (FEIS) approach, valleys are represented by inherent structures that are statistically grouped according to their free-energy rather than the energy as is commonly done in the standard procedure. The FEIS method provides a further step toward a description of the relaxational behavior of glassy systems in terms of a free energy measure. It can be used to determine the character of the glass transition as well as the mode coupling and the Kauzmann temperatures. We illustrate the usefulness of the method by applying it to simple models of glasses and spin glasses.

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