Unusual percolation in simple small-world networks

Details Unusual percolation in simple small-world networks Unusual percolation in simple small-world networks

2008-02-07

arxiv.org/abs/0802.1055v1

Phys. Rev. E 79, 066112 (2009)

Physics

Condensed Matter

Disordered Systems and Neural Networks

10 pages, 4 figures, revtex4

Scientific paper

10.1103/PhysRevE.79.066112

We present an exact solution of percolation in a generalized class of Watts-Strogatz graphs defined on a 1-dimensional underlying lattice. We find a non-classical critical point in the limit of the number of long-range bonds in the system going to zero, with a discontinuity in the percolation probability and a divergence in the mean finite-cluster size. We show that the critical behavior falls into one of three regimes depending on the proportion of occupied long-range to unoccupied nearest-neighbor bonds, with each regime being characterized by different critical exponents. The three regimes can be united by a single scaling function around the critical point. These results can be used to identify the number of long-range links necessary to secure connectivity in a communication or transportation chain. As an example, we can resolve the communication problem in a game of "telephone".

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