(1) Departement de Mathématiques, Université Paris VI, 4, Place Jussieu, 75252 Paris Cedex 05, France;(2) Physics Department, Clarkson University, 13699-5820 Potsdam, New York
Abstract:
We construct diffusions in random velocity fields which present anomalous superdiffusive behavior. The mean square displacement can be made to have any power lawt for 1<2. Higher moments and characteristic functions are also investigated.