Abstract
The relation between diffusion and conduction in the random walk of a particle by means of Lévy hops is investigated. It is shown that on account of the unusual character of Lévy hops, the mobility of a particle is a nonlinear function of the electric field for arbitrarily weak fields.
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Pis’ma Zh. Éksp. Teor. Fiz. 67, No. 7, 518–520 (10 April 1998)