Precise Determination of the Conductivity Exponent of 3d Percolation Using "percola"

Using 20 months of CPU time on our special purpose computer "Percola" we determined the exponent for the normal conductivity at the threshold of three-dimensional site and bond percolation. The extrapolation analysis taking into account the first correction to scaling gives a value of t/ν = 2.26±0.04 and a correction exponent ω around 1.4.