Low temperature solution of the Sherrington-Kirkpatrick model

Details Low temperature solution of the Sherrington-Kirkpatrick model Low temperature solution of the Sherrington-Kirkpatrick model

2005-12-12

arxiv.org/abs/cond-mat/0512253v1

Phys. Rev. Lett. 96, 197204 (2006)

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.96.197204

We propose a simple scaling ansatz for the full replica symmetry breaking solution of the Sherrington-Kirkpatrick model in the low energy sector. This solution is shown to become exact in the limit x->0, x>>T of the Parisi replica symmetry breaking scheme parameter x. The distribution function P(x,y) of the frozen fields y has been known to develop a linear gap at zero temperature. We integrate the scaling equations to find an exact numerical value for the slope of the gap to be 0.3014046... We also use the scaling solution to devise an inexpensive numerical procedure for computing finite timescale (x=1) quantities. The entropy, the zero field cooled susceptibility and the local field distribution function are computed in the low temperature limit with high precision, barely achievable by currently available methods.

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