Quadratic contact process: phase separation with interface-orientation-dependent equistability |
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Authors: | Liu Da-Jiang Guo Xiaofang Evans J W |
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Affiliation: | Ames Laboratory, U.S. Department of Energy, Ames, Iowa 50011-3020, USA. |
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Abstract: | The quadratic contact process is implemented on a square lattice as a model with random adsorption and correlated desorption requiring empty pairs of diagonal neighbors. The model exhibits a discontinuous phase transition between an active state and an absorbing state, but equistability between these states depends on the orientation of the separating interface. Correspondingly, for a generalized class of models, we find phase coexistence over a finite region of their two-dimensional parameter space. This is in stark contrast to behavior in equilibrium systems. |
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