Ordering temperature of the infinite-range ±JIsing spin glass

Abstract

The spin glass susceptibility of ‘‘infinite-range’’ ±J Ising spin glass samples has been measured as a function of sample size and temperature using numerical simulations. A slow-cooling annealing schedule was used. The data indicate that spin glass order appears to set in only at a temperature well below T=1, the accepted theoretical ordering temperature ${\mathit{T}}_{\mathit{g}}$ for the infinite-range Ising spin glass model.