Title 



Transition from singlefile to twodimensional diffusion of interacting particles in a quasionedimensional channel
 
Author 



 
Abstract 



Diffusive properties of a monodisperse system of interacting particles confined to a quasionedimensional channel are studied using molecular dynamics simulations. We calculate numerically the meansquared displacement (MSD) and investigate the influence of the width of the channel (or the strength of the confinement potential) on diffusion in finitesize channels of different shapes (i.e., straight and circular). The transition from singlefile diffusion to the twodimensional diffusion regime is investigated. This transition [ regarding the calculation of the scaling exponent (alpha) of the MSD proportional to t(alpha)] as a function of the width of the channel is shown to change depending on the channel's confinement profile. In particular, the transition can be either smooth (i.e., for a parabolic confinement potential) or rather sharp (i.e., for a hardwall potential), as distinct from infinite channels where this transition is abrupt. This result can be explained by qualitatively different distributions of the particle density for the different confinement potentials.   
Language 



English
 
Source (journal) 



Physical review : E : statistical, nonlinear, and soft matter physics / American Physical Society.  Melville, N.Y., 2001  2015  
Publication 



Melville, N.Y. : American Physical Society, 2012
 
ISSN 



15393755 [print]
15502376 [online]
 
Volume/pages 



85:3:1(2012), p. 031147,1031147,12
 
Article Reference 



031147
 
ISI 



000302117900003
 
Medium 



Eonly publicatie
 
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