Window effect in a discretized model for diffusion of a chain in one dimension

G. TERRANOVA; C.M. ALDAO; H.O. MÁRTIN

PHYSICAL REVIEW E - STATISTICAL PHYSICS, PLASMAS, FLUIDS AND RELATED INTERDISCIPLINARY TOPICS

Año: 2005 vol. 71 p. 21103 - 21103

1063-651X

We introduce a model to study the diffusion of chains in microporous solids.  The difficulties a chain has to escape from a pore where it is confined is found to strongly depend on the ratio between the chain length and the cage size.  This dynamic effect implies a non standard behavior of the diffusion coefficient.  We found a window effect that can be explained from a new point of view without using any energy argument.