Order-Parameter Flow in the SK Spin-Glass II: Inclusion of Microscopic Memory Effects

Details Order-Parameter Flow in the SK Spin-Glass II: Inclusion of Microscopic Memory Effects Order-Parameter Flow in the SK Spin-Glass II: Inclusion of Microscopic Memory Effects

1995-07-25

arxiv.org/abs/cond-mat/9507108v2

Physics

Condensed Matter

same as original, but this one is TeXable

Scientific paper

10.1088/0305-4470/29/4/007

We develop further a recent dynamical replica theory to describe the dynamics of the Sherrington-Kirkpatrick spin-glass in terms of closed evolution equations for macroscopic order parameters. We show how microscopic memory effects can be included in the formalism through the introduction of a dynamic order parameter function: the joint spin-field distribution. The resulting formalism describes very accurately the relaxation phenomena observed in numerical simulations, including the typical overall slowing down of the flow that was missed by the previous simple two-parameter theory. The advanced dynamical replica theory is either exact or a very good approximation.

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