Memory effects in the self-diffusion of interacting Brownian particles
- 15 June 1992
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 96 (12) , 9055-9059
- https://doi.org/10.1063/1.462213
Abstract
We study the time-dependent self-diffusion coefficient for suspensions of interacting, spherical Brownian particles. The self-diffusion coefficient exhibits memory effects with a wide range of relaxation times and a long-time tail. An approximate description of the time dependence involving a small number of parameters is proposed. We test the approximation for an exactly solvable model in which the particles interact via a square step or well potential and show that it works satisfactorily.Keywords
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