Scaling of stiffness energy for 3d +/-J Ising spin glasses
Alexander K. Hartmann
Abstract
Large numbers of ground states of 3d EA Ising spin glasses are calculated for sizes up to 103 using a combination of a genetic algorithm and Cluster-Exact Approximation. A detailed analysis shows that true ground states are obtained. The ground state stiffness (or domain wall) energy D is calculated. A D ~ Lt behavior with t=0.19(2) is found which strongly indicates that the 3d model has an equilibrium spin-glass-paramagnet transition for non-zero Tc.
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