One-Dimensional Random Walk in Multi-Zone Environment

A. V. Nazarenko, V. Blavatska

Published 2016-10-24Version 1

We study a symmetric random walk (RW) in one spatial dimension in environment, formed by several zones of finite width, where the probability of transition between two neighbouring points and corresponding diffusion coefficient are considered to be differently fixed. We derive analytically the probability to find a walker at the given position and time. The probability distribution function is found and has no Gaussian form because of properties of adsorption in the bulk of zones and reflection at the separation points. Time dependence of the mean squared displacement of a walker is studied as well and revealed the anomalous behaviour as compared with ordinary RW.