https://doi.org/10.1140/epjb/e2006-00217-7
Nonequilibrium critical behavior of a species coexistence model
1
Institut für Festkörperphysik, TU Darmstadt, Hochschulstraße 6, 64289 Darmstadt, Germany
2
Fakultät für Physik und Astronomie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Corresponding authors: a barbara.drossel@physik.tu-darmstadt.de - b hinrichsen@physik.uni-wuerzburg.de
Received:
10
March
2006
Revised:
11
April
2006
Published online:
2
June
2006
A biologically motivated model for spatio-temporal coexistence of two competing species is studied by mean-field theory and numerical simulations. In d ≥2 dimensions the phase diagram displays an extended region where both species coexist, bounded by two second-order phase transition lines belonging to the directed percolation universality class. The two transition lines meet in a multicritical point, where a non-trivial critical behavior is observed.
PACS: 87.23.Cc – Population dynamics and ecological pattern formation / 05.70.Ln – Nonequilibrium and irreversible thermodynamics / 64.60.Ak – Renormalization-group, fractal, and percolation studies of phase transitions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2006
