Sandpile Dynamics Driven by Degree on Scale-Free Networks
YIN Yan-Ping1, ZHANG Duan-Ming1, PAN Gui-Jun 1,2, HE Min-Hua1
1Department of Physics, Huazhong University of Science and Technology, Wuhan 4300742Faculty of Physics and Electronic Technology, Hubei University, Whan 430062
Sandpile Dynamics Driven by Degree on Scale-Free Networks
1Department of Physics, Huazhong University of Science and Technology, Wuhan 4300742Faculty of Physics and Electronic Technology, Hubei University, Whan 430062
摘要We introduce a sandpile model driven by degree on scale-free networks, where the perturbation is triggered at nodes with the same degree. We numerically investigate the avalanche behaviour of sandpile driven by different degrees on scale-free networks. It is observed that the avalanche area has the same behaviour with avalanche size. When the sandpile is driven at nodes with the minimal degree, the avalanches of our model behave similarly to those of the original Bak--Tang--Wiesenfeld (BTW) model on scale-free networks. As the degree of driven nodes increases from the minimal value to the maximal value, the avalanche distribution gradually changes from a clean power law, then a mixture of Poissonian and power laws, finally to a Poisson-like distribution. The average avalanche area is found to increase with the degree of driven nodes so that perturbation triggered on higher-degree nodes will result in broader spreading of avalanche propagation.
Abstract：We introduce a sandpile model driven by degree on scale-free networks, where the perturbation is triggered at nodes with the same degree. We numerically investigate the avalanche behaviour of sandpile driven by different degrees on scale-free networks. It is observed that the avalanche area has the same behaviour with avalanche size. When the sandpile is driven at nodes with the minimal degree, the avalanches of our model behave similarly to those of the original Bak--Tang--Wiesenfeld (BTW) model on scale-free networks. As the degree of driven nodes increases from the minimal value to the maximal value, the avalanche distribution gradually changes from a clean power law, then a mixture of Poissonian and power laws, finally to a Poisson-like distribution. The average avalanche area is found to increase with the degree of driven nodes so that perturbation triggered on higher-degree nodes will result in broader spreading of avalanche propagation.
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2007, Vol. 24 
