Lévy walks and scaling in quenched disordered media.
We study Lévy walks in quenched disordered one-dimensional media, with scatterers spaced according to a long-tailed distribution. By analyzing the scaling relations for the random-walk probability and for the resistivity in the equivalent electric problem, we obtain the asymptotic behavior of the mean-square displacement as a function of the exponent characterizing the scatterers distribution. We demonstrate that in quenched media different average procedures can display different asymptotic behavior. In particular, we estimate the moments of the displacement averaged over processes starting from scattering sites. Our results are compared with numerical simulations, with excellent agreement.
Burioni
Raffaella
R
Dipartimento di Fisica, Università degli Studi di Parma, viale G. P. Usberti 7/A, 43100 Parma, Italy.
Caniparoli
Luca
L
Vezzani
Alessandro
A