Quadratic contact process: phase separation with interface-orientation-dependent equistability.

@article{Liu2007QuadraticCP,
  title={Quadratic contact process: phase separation with interface-orientation-dependent equistability.},
  author={Da-Jiang Liu and Xiaofang Guo and James W Evans},
  journal={Physical review letters},
  year={2007},
  volume={98 5},
  pages={050601}
}
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… CONTINUE READING