Random Sequential Adsorption on a Line: Mean-Field Theory of Diffusional Relaxation

Details Random Sequential Adsorption on a Line: Mean-Field Theory of Diffusional Relaxation Random Sequential Adsorption on a Line: Mean-Field Theory of Diffusional Relaxation

1992-07-03

arxiv.org/abs/cond-mat/9207004v1

J. Chem. Phys. 97, 6714-6719 (1992)

Physics

Condensed Matter

18 pages

Scientific paper

10.1063/1.463677

We develop a new fast-diffusion approximation for the kinetics of deposition of extended objects on a linear substrate, accompanied by diffusional relaxation. This new approximation plays the role of the mean-field theory for such processes and is valid over a significantly larger range than an earlier variant, which was based on a mapping to chemical reactions. In particular, continuum-limit off-lattice deposition is described naturally within our approximation. The criteria for the applicability of the mean-field theory are derived. While deposition of dimers, and marginally, trimers, is affected by fluctuations, we find that the k-mer deposition kinetics is asymptotically mean-field like for all k=4,5,..., where the limit k->infinity, when properly defined, describes deposition-diffusion kinetics in the continuum.

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