Weighted Scale-free Networks in Euclidean Space Using Local Selection Rule

Details Weighted Scale-free Networks in Euclidean Space Using Local Selection Rule Weighted Scale-free Networks in Euclidean Space Using Local Selection Rule

2005-03-30

arxiv.org/abs/cond-mat/0503697v2

Phys. Rev. E 74, 036111 (2006)

Physics

Condensed Matter

Statistical Mechanics

6 pages, 6 figures

Scientific paper

10.1103/PhysRevE.74.036111

A spatial scale-free network is introduced and studied whose motivation has been originated in the growing Internet as well as the Airport networks. We argue that in these real-world networks a new node necessarily selects one of its neighbouring local nodes for connection and is not controlled by the preferential attachment as in the Barab\'asi-Albert (BA) model. This observation has been mimicked in our model where the nodes pop-up at randomly located positions in the Euclidean space and are connected to one end of the nearest link. In spite of this crucial difference it is observed that the leading behaviour of our network is like the BA model. Defining link weight as an algebraic power of its Euclidean length, the weight distribution and the non-linear dependence of the nodal strength on the degree are analytically calculated. It is claimed that a power law decay of the link weights with time ensures such a non-linear behavior. Switching off the Euclidean space from the same model yields a much simpler definition of the Barab\'asi-Albert model where numerical effort grows linearly with $N$.

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