A. Lipowski et M. Lopata, Model of biological evolution with threshold dynamics and infinitely many absorbing states, PHYS REV E, 60(2), 1999, pp. 1516-1519
We study a model of biological evolution where the survival of a given spec
ies depends on its interactions with neighboring species. In the steady sta
te the model has an active phase and an absorbing phase, which are separate
d by the critical point of the directed percolation universality class. The
absorbing phase is infinitely degenerate and the dynamical behavior of our
model is found to be nonuniversal. [S1063-651X(99)12908-8].