Scale-free network topology and multifractality in weighted planar stochastic lattice

Details Scale-free network topology and multifractality in weighted planar stochastic lattice Scale-free network topology and multifractality in weighted planar stochastic lattice

2010-08-30

arxiv.org/abs/1008.4994v1

New J. Physics 12, 093045 (2010)

Physics

Condensed Matter

Statistical Mechanics

7 pages, 8 figures, To appear in New Journal of Physics (NJP)

Scientific paper

10.1088/1367-2630/12/9/093045

We propose a weighted planar stochastic lattice (WPSL) formed by the random sequential partition of a plane into contiguous and non-overlapping blocks and find that it evolves following several non-trivial conservation laws, namely $\sum_i^N x_i^{n-1} y_i^{4/n-1}$ is independent of time $\forall \ n$, where $x_i$ and $y_i$ are the length and width of the $i$th block. Its dual on the other hand, obtained by replacing each block with a node at its center and common border between blocks with an edge joining the two vertices, emerges as a network with a power-law degree distribution $P(k)\sim k^{-\gamma}$ where $\gamma=5.66$ revealing scale-free coordination number disorder since $P(k)$ also describes the fraction of blocks having $k$ neighbours. To quantify the size disorder, we show that if the $i$th block is populated with $p_i\sim x_i^3$ then its distribution in the WPSL exhibits multifractality.

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