Small-scale properties of a stochastic cubic-autocatalytic reaction-diffusion model

Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Oct;92(4):042114. doi: 10.1103/PhysRevE.92.042114. Epub 2015 Oct 7.

Abstract

We investigate the small-scale properties of a stochastic cubic-autocatalytic reaction-diffusion (CARD) model using renormalization techniques. We renormalize noise-induced ultraviolet divergences and obtain β functions for the decay rate and coupling at one loop. Assuming colored (power-law) noise, our results show that the behavior of both decay rate and coupling with scale depends crucially on the noise exponent. Interpreting the CARD model as a proxy for a (very simple) living system, our results suggest that power-law correlations in environmental fluctuations can both decrease or increase the growth of structures at smaller scales.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Catalysis
  • Diffusion
  • Models, Theoretical*
  • Stochastic Processes