Noise-induced dynamical transition in systems with symmetric absorbing states

Details Noise-induced dynamical transition in systems with symmetric absorbing states Noise-induced dynamical transition in systems with symmetric absorbing states

2010-12-09

arxiv.org/abs/1012.1988v2

Phys Rev Lett. (2011) 106 165702

Physics

Condensed Matter

Statistical Mechanics

v2 with improved introduction and figures, to appear in PRL. 4 pages, 4 figures

Scientific paper

10.1103/PhysRevLett.106.165702

We investigate the effect of noise strength on the macroscopic ordering dynamics of systems with symmetric absorbing states. Using an explicit stochastic microscopic model, we present evidence for a phase transition in the coarsening dynamics, from an Ising-like to a voter-like behavior, as the noise strength is increased past a nontrivial critical value. By mapping to a thermal diffusion process, we argue that the transition arises due to locally-absorbing states being entered more readily in the high-noise regime, which in turn prevents surface tension from driving the ordering process.

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