Physics and Astronomy, Mathematics, Ames Laboratory
Journal or Book Title
Physical Review Letters
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.
American Physical Society
Liu, Da-Jiang; Guo, Xiaofang; and Evans, James W., "Quadratic Contact Process: Phase Separation with Interface-Orientation-Dependent Equistability" (2007). Physics and Astronomy Publications. 205.