22-01E
22-01E
Survival in two-species reaction-superdiffusion system: Renormalization group treatment and numerical simulations
We analyze the two-species reaction-diffusion system including trapping reaction A + B → A as well as coagulation/annihilation reactions A + A → (A,0) where particles of both species are performing Lévy flights with control parameter 0 < σ < 2. The density as well as the correlation function for target particles B in such problem are known to scale with nontrivial universal exponents at space dimension d ≤ dc. Applying the renormalization group formalism we calculate these exponents in a case of the Lévy flights below the critical dimension dc = σ. The numerical simulations of the process on a one-dimensional chain are performed as well. Obtained quantitative estimates for the decay exponent of the density of survived particles B are in a good agreement with the analytical results.