Physics – Physics and Society
Scientific paper
2011-05-18
European Physics Letters, Vol. 97, No. 6 (March 2012) 68006
Physics
Physics and Society
4 pages, 4 figures
Scientific paper
10.1209/0295-5075/97/68006
We study the variation in epidemic thresholds in complex networks with different assortativity properties. We determine the thresholds by applying spectral analysis to the matrices associated to the graphs. In order to produce graphs with a specific assortativity we introduce a procedure to sample the space of all the possible networks with a given degree sequence. Our analysis shows that while disassortative networks have an higher epidemiological threshold, assortative networks have a slower diffusion time for diseases. We also used these networks for evaluating the effects of assortativity in a specific dynamic model of sandpile. We show that immunization procedures give different results according to the assortativity of the network considered.
Caldarelli Guido
D'Agostino Gregorio
Scala Antonio
Zlatic Vinko
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