Multifractal current distribution in random-diode networks.
Recently it has been shown analytically that electric currents in a random-diode network are distributed in a multifractal manner [O. Stenull and H. K. Janssen, Europhys. Lett. 55, 691 (2001)]. In the present paper we investigate the multifractal properties of a random diode network at the critical point by numerical simulations. We analyze the currents running on a directed percolation cluster and confirm the field-theoretic predictions for the scaling behavior of moments of the current distribution. It is pointed out that a random diode network is a particularly good candidate for a possible experimental realization of directed percolation.
Hinrichsen
Haye
H
Theoretische Physik, Fachbereich 8, Universität GH Wuppertal, 42097 Wuppertal, Germany.
Stenull
Olaf
O
Janssen
Hans-Karl
HK