title: Anomalous diffusion in a running sandpile model.
abstract: To explore the character of underlying transport in a sandpile, we have followed the motion of tracer particles. Moments of the distribution function of the particle positions, </x(t)-x(0)/(n)>=D(0)t(nnu(n)), are determined as a function of the elapsed time. The numerical results show that the transport mechanism for distances less than the sandpile length is superdiffusive with an exponent nu(n) close to 0.75, for n<1.
authors.affiliation: Oak Ridge National Laboratory, Oak Ridge, TN 37831-8070, USA.
authors.forename: B A
authors.initials: BA
authors.lastname: Carreras
authors.forename: V E
authors.initials: VE
authors.lastname: Lynch
authors.forename: D E
authors.initials: DE
authors.lastname: Newman
authors.forename: G M
authors.initials: GM
authors.lastname: Zaslavsky