Scaling of the largest dynamical barrier in the one-dimensional long-range Ising spin-glass

Abstract

The long-range one-dimensional Ising spin-glass with random couplings decaying as $J(r)\propto r^{-\sigma }$ presents a spin-glass phase $T_c(\sigma )>0$ for $0\le \sigma <1$ (the limit $\sigma =0$ corresponds to the mean-field SK-model). We use the eigenvalue method introduced in our previous work [C. Monthus and T. Garel, J. Stat. Mech. P12017 (2009)] to measure the equilibrium time $t_{eq}(N)$ at temperature $T=T_c(\sigma )/2$ as a function of the number $N$ of spins. We find the activated scaling $\ln t_{eq}(N)\sim N^{\psi }$ with the same barrier exponent $\psi \simeq 0.33$ in the whole region $0\le \sigma <1$.

v3=final version (12 pages)

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