On the dynamics of a spherical spin-glass

Details On the dynamics of a spherical spin-glass On the dynamics of a spherical spin-glass

1995-05-30

arxiv.org/abs/cond-mat/9505149v1

J. Phys. A 28 (1995) L453

Physics

Condensed Matter

Latex file, 9 pages, plus 2 figures

Scientific paper

10.1088/0305-4470/28/17/001

We carry out an analysis of the effect of a quenched magnetic field on the dynamics of the spherical Sherrington-Kirkpatrick spin-glass model. We show that there is a characteristic time introduced by the presence of the field. Firstly, for times sufficiently small the dynamic scenario of the zero field case - with aging effects - is reproduced. Secondly, for times larger than the characteristic time one sees equilibrium dynamics. This dynamical behaviour is reconciled with the geometry of the energy landscape of the model. We compare this behaviour with experimental observations at a finite applied field.

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