Evolution equation for a model of surface relaxation in complex networks

Details Evolution equation for a model of surface relaxation in complex networks Evolution equation for a model of surface relaxation in complex networks

2007-12-21

arxiv.org/abs/0712.3788v3

Phys Rev E 77, 046120 (2008)

Physics

Condensed Matter

Statistical Mechanics

9 pages, 2 figures

Scientific paper

10.1103/PhysRevE.77.046120

In this paper we derive analytically the evolution equation of the interface for a model of surface growth with relaxation to the minimum (SRM) in complex networks. We were inspired by the disagreement between the scaling results of the steady state of the fluctuations between the discrete SRM model and the Edward-Wilkinson process found in scale-free networks with degree distribution $ P(k) \sim k^{-\lambda}$ for $\lambda <3$ [Pastore y Piontti {\it et al.}, Phys. Rev. E {\bf 76}, 046117 (2007)]. Even though for Euclidean lattices the evolution equation is linear, we find that in complex heterogeneous networks non-linear terms appear due to the heterogeneity and the lack of symmetry of the network; they produce a logarithmic divergency of the saturation roughness with the system size as found by Pastore y Piontti {\it et al.} for $\lambda <3$.

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