Efficiency of encounter-controlled reaction between diffusing reactants in a finite lattice: Non-nearest-neighbor effects

Jonathan L. Bentz, John J. Kozak and Gregoire Nicolis

Physica A: Statistical Mechanics and its Applications, 2005, vol. 353, issue C, 73-84

Abstract: The influence of non-nearest-neighbor displacements on the efficiency of diffusion–reaction processes involving one and two mobile diffusing reactants is studied. An exact analytic result is given for dimension d=1 from which, for large lattices, one can recover the asymptotic estimate reported 30 years ago by Lakatos-Lindenberg and Shuler. For dimensions d=2,3 we present numerically exact values for the mean time to reaction, as gauged by the mean walklength before reactive encounter, obtained via the theory of finite Markov processes and supported by Monte Carlo simulations. Qualitatively different results are found between processes occurring on d=1 versus d>1 lattices, and between results obtained assuming nearest-neighbor (only) versus non-nearest-neighbor displacements.

Keywords: Diffusion-controlled reactions; Lattice walks; Non-nearest-neighbor displacements (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:353:y:2005:i:c:p:73-84

DOI: 10.1016/j.physa.2005.02.006

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