Finite-size scaling of the stochastic susceptible-infected-recovered model

Details Finite-size scaling of the stochastic susceptible-infected-recovered model Finite-size scaling of the stochastic susceptible-infected-recovered model

2010-12-19

arxiv.org/abs/1012.4138v1

J. Stat. Mech. 2011, P03006 (2011)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Scientific paper

10.1088/1742-5468/2011/03/P03006

The critical behavior of the stochastic susceptible-infected-recovered model on a square lattice is obtained by numerical simulations and finite-size scaling. The order parameter as well as the distribution in the number of recovered individuals is determined as a function of the infection rate for several values of the system size. The analysis around criticality is obtained by exploring the close relationship between the present model and standard percolation theory. The quantity UP, equal to the ratio U between the second moment and the squared first moment of the size distribution multiplied by the order parameter P, is shown to have, for a square system, a universal value 1.0167(1) that is the same as for site and bond percolation, confirming further that the SIR model is also in the percolation class.

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