Langevin dynamics of the Lebowitz-Percus model

Details Langevin dynamics of the Lebowitz-Percus model Langevin dynamics of the Lebowitz-Percus model

1997-03-10

arxiv.org/abs/cond-mat/9703095v2

Physics

Condensed Matter

Materials Science

21 pages, RevTeX, 14 PS figures

Scientific paper

10.1088/0305-4470/30/20/014

We revisit the hard-spheres lattice gas model in the spherical approximation proposed by Lebowitz and Percus (J. L. Lebowitz, J. K. Percus, Phys. Rev.{\ 144} (1966) 251). Although no disorder is present in the model, we find that the short-range dynamical restrictions in the model induce glassy behavior. We examine the off-equilibrium Langevin dynamics of this model and study the relaxation of the density as well as the correlation, response and overlap two-time functions. We find that the relaxation proceeds in two steps as well as absence of anomaly in the response function. By studying the violation of the fluctuation-dissipation ratio we conclude that the glassy scenario of this model corresponds to the dynamics of domain growth in phase ordering kinetics.

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