Sandpile Model on Sierpinski Gasket Fractal
Abstract
We investigate the sandpile model on the twodimensional Sierpinski gasket fractal. We find that the model displays novel critical behavior, and we analyze the distribution functions of avalanche sizes, lifetimes and topplings and calculate the associated critical exponents $\tau = 1.51 \pm 0.04$, $\alpha = 1.63 \pm 0.04$ and $\mu = 1.36 \pm 0.04$. The avalanche size distribution shows power law behavior modulated by logarithmic oscillations which can be related to the discrete scale invariance of the underlying lattice. Such a distribution can be formally described by introducing a complex scaling exponent ${\tau}^{*} \equiv \tau + i \delta$, where the real part $\tau$ corresponds to the power law and the imaginary part $\delta$ is related to the period of the logarithmic oscillations.
 Publication:

arXiv eprints
 Pub Date:
 April 1995
 arXiv:
 arXiv:condmat/9504022
 Bibcode:
 1995cond.mat..4022K
 Keywords:

 Condensed Matter
 EPrint:
 Revised version. Some numerical values have been changed and additional results have been added. To appear in Physical Review E. 4 revtex pages, 10 postscript figures