Dynamics-dependent criticality in models with q absorbing states.
We study a one-dimensional, nonequilibrium Potts-like model that has q symmetric absorbing states. For q=2, as expected, the model belongs to the parity-conserving universality class. For q=3 the critical behavior depends on the dynamics of the model. Under a certain dynamics it remains generically in the active phase, which is also the feature of some other models with three absorbing states. However, a modified dynamics induces a parity-conserving phase transition. Relations with branching-annihilating random walk models are discussed in order to explain such a behavior.
Lipowski
Adam
A
Department of Physics, University of Genève, CH 1211 Genève 4, Switzerland.
Droz
Michel
M