Scaling of spin avalanches in growing networks

Details Scaling of spin avalanches in growing networks Scaling of spin avalanches in growing networks

2009-04-17

arxiv.org/abs/0904.2697v2

Physics

Condensed Matter

Disordered Systems and Neural Networks

10 pages, 9 figures. More data in Fig. 7

Scientific paper

Growing networks decorated with antiferromagnetically coupled spins are archetypal examples of complex systems due to the frustration and the multivalley character of their energy landscapes. Here we use the damage spreading method (DS) to investigate the cohesion of spin avalanches in the exponential networks and the scale-free networks. On the contrary to the conventional methods, the results obtained from DS suggest that the avalanche spectra are characterized by the same statistics as the degree distribution in their home networks. Further, the obtained mean range $Z$ of an avalanche, i.e. the maximal distance reached by an avalanche from the damaged site, scales with the avalanche size $s$ as $Z/N^\beta =f(s/N^{\alpha})$, where $\alpha=0.5$ and $\beta=0.33$. These values are true for both kinds of networks for the number $M$ of nodes to which new nodes are attached between 4 and 10; a check for M=25 confirms these values as well.

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