Large-Scale Simulations of Diffusion-Limited n-Species Annihilation

Abstract

We present results from computer simulations for diffusion-limited $n$-species annihilation, $A_i+A_j\to 0$ $(i,j=1,2,...,n;i\ne j)$, on the line, for lattices of up to $2^{28}$ sites, and where the process proceeds to completion (no further reactions possible), involving up to $10^{15}$ time steps. These enormous simulations are made possible by the renormalized reaction-cell method (RRC). Our results suggest that the concentration decay exponent for $n$ species is $\a(n)=(n-1)/2n$ instead of $(2n-3)/(4n-4)$, as previously believed, and are in agreement with recent theoretical arguments \cite{tauber}. We also propose a scaling relation for $\Delta$, the correction-to-scaling exponent for the concentration decay; $c(t)\sim t^{-\a}(A+Bt^{-Δ})$.

References in corpus (1)

• Multi-species pair annihilation reactions

Cited by in corpus (6)

• Applications of Field-Theoretic Renormalization Group Methods to Reaction-Diffusion Problems
• First-Passage Kinetic Monte Carlo method
• Efficient Reactive Brownian Dynamics
• Symmetry and species segregation in diffusion-limited pair annihilation
• Finite Size Fluctuations in Interacting Particle Systems
• Segregation in diffusion-limited multispecies pair annihilation