4 papers
noise in extremal dynamics
Rahul Chhimpa, Abha Singh, Avinash Chand Yadav
The Bak-Sneppen (BS) evolution model remains a well-studied example of self-organized criticality (SOC). We propose a simple variant of the BS model, where the global fitness fluct…
Correlation time in extremal self-organized critical models
Rahul Chhimpa, Abha Singh, Avinash Chand Yadav
We investigate correlation time numerically in extremal self-organized critical models, namely, the Bak-Sneppen evolution and the Robin Hood dynamics. The (fitness) correlation tim…
Fitness noise in the Bak-Sneppen evolution model in high dimensions
Rahul Chhimpa, Abha Singh, Avinash Chand Yadav
We study the Bak-Sneppen evolution model on a regular hypercubic lattice in high dimensions. Recent work [Phys. Rev. E 108, 044109 (2023)] has shown the emergence of the n…
noise in the Robin Hood model
Abha Singh, Rahul Chhimpa, Avinash Chand Yadav
We consider the Robin Hood dynamics, a one-dimensional extremal self-organized critical model that describes the evolution of low-temperature creep. One of the key quantities is th…