Universality Class of Two-Offspring Branching Annihilating Random Walks

Details Universality Class of Two-Offspring Branching Annihilating Random Walks Universality Class of Two-Offspring Branching Annihilating Random Walks

1995-09-09

arxiv.org/abs/cond-mat/9509048v1

Physics

Condensed Matter

10 pages, tex, 4 figures uuencoded, also available upon request

Scientific paper

10.1016/0375-9601(95)00869-1

We analyze a two-offspring Branching Annihilating Random Walk ($n=2$ BAW) model, with finite annihilation rate. The finite annihilation rate allows for a dynamical phase transition between a vacuum, absorbing state and a non-empty, active steady state. We find numerically that this transition belongs to the same universality class as BAW's with an even number of offspring, $n\geq 4$, and that of other models whose dynamic rules conserve the parity of the particles locally. The simplicity of the model is exploited in computer simulations to obtain various critical exponents with a high level of accuracy.

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