Abstract
The Bak-Sneppen (BS) model is a very simple model that exhibits all the richness of self-organized criticality theory. At the thermodynamic limit, the BS model converges to a situation where all particles have a fitness that is uniformly distributed between a critical value and 1. The value is unknown, as are the variables that influence and determine this value. Here we study the BS model in the case in which the lowest fitness particle interacts with an arbitrary even number of nearest neighbors. We show that verifies a simple local equilibrium relation. Based on this relation, we can determine bounds for of the BS model and exact results for some BS-like models. Finally, we show how transformations of the original BS model can be done without altering the model's complex dynamics.
- Received 25 September 2017
- Revised 6 October 2017
DOI:https://doi.org/10.1103/PhysRevE.97.042123
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