1/f NOISE FROM DIFFUSION IN LATTICE GASSES

Abstract

Numerical studies of a lattice gas consisting of repulsive particles found 1/fβ power spectra for the total number of particles on the lattice. The value of β depends on the definition of the dynamics of the models. Models with deterministic dynamics have β=1, whereas for stochastic dynamic β=1.5. The scaling relation a+β=3 where α is the lifetime exponent is found to be fulfilled approximately. A discussion of the numerical observations in terms of driven diffusion equations is given.