Inter-Particle Distribution Functions for One-Species Diffusion-Limited Annihilation, A+A->0

Details Inter-Particle Distribution Functions for One-Species Diffusion-Limited Annihilation, A+A->0 Inter-Particle Distribution Functions for One-Species Diffusion-Limited Annihilation, A+A->0

1995-07-04

arxiv.org/abs/cond-mat/9507007v1

Phys. Lett. A 206, 18--25 (1995).

Physics

Condensed Matter

15 pages, plain TeX, 3 figures - available upon request (snail mail)

Scientific paper

10.1016/0375-9601(95)00625-D

Diffusion-limited annihilation, $A+A\to 0$, and coalescence, $A+A\to A$, may both be exactly analyzed in one dimension. While the concentrations of $A$ particles in the two processes bear a simple relation, the inter-particle distribution functions (IPDF) exhibit remarkable differences. However, the IPDF is known exactly only for the coalescence process. We obtain the IPDF for the annihilation process, based on the Glauber spin approach and assuming that the IPDF's of nearest-particle pairs are statistically independent. This assumption is supported by computer simulations. Our analysis sheds further light on the relationship between the annihilation and the coalescence models.

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