title: Dynamics of a rigid rod in a disordered medium with long-range spatial correlation.
abstract: We investigate the diffusion of a rigid rodlike object in a two-dimensional disordered host medium, which consists of static pointlike sources of force. The points are distributed with long-range spatial correlation and interact with the rod via a repulsive potential. The time dependence of the rod's center-of-mass mean-squared displacement and its rotational mean-squared displacement are obtained for various degrees of long-range spatial correlation and rod's lengths. These transport characteristics are compared to those obtained in previous studies for the case of homogeneous distribution of force points. It is shown that existence of long-range correlation among force points makes the center of mass diffusion anomalous.
authors: Department of Physics, University of Zanjan, P.O. Box 45196-313, Zanjan, Iran and School of Nano-science, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran, Iran.
authors: M Ebrahim
authors: ME
authors: Foulaadvand
authors: Department of Physics, Kharazmi University, P.O. Box 15614, Tehran, Iran.
authors: Mahdiyeh
authors: M
authors: Sadrara