Europhys. Lett., 57 (5) , pp. 765-771 (2002)
The Bak-Sneppen model on scale-free networksY. Moreno1 and A. Vazquez2
1 The Abdus Salam International Centre for Theoretical Physics, Condensed Matter Group - P.O. Box 586, Trieste, I-34014, Italy
2 International School for Advanced Studies (SISSA) - Trieste, Italy
(Received 24 August 2001; accepted in final form 5 December 2001)
We investigate by numerical simulations and analytical calculations the Bak-Sneppen model for biological evolution in scale-free networks. By using large-scale numerical simulations, we study the avalanche size distribution and the activity time behavior at nodes with different connectivities. We argue the absence of a critical barrier and its associated critical behavior for infinite-size systems. These findings are supported by a single-site mean-field analytic treatment of the model.
89.75.-k - Complex systems.
05.65.+b - Self-organized systems.
87.23.-n - Ecology and evolution.
© EDP Sciences 2002