Scale-free networks from varying vertex intrinsic fitness |
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Authors: | Caldarelli G Capocci A De Los Rios P Muñoz M A |
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Institution: | INFM UdR ROMA1 Dipartimento Fisica, Università di Roma La Sapienza, Piazzale Aldo Moro 2, Italy. |
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Abstract: | A new mechanism leading to scale-free networks is proposed in this Letter. It is shown that, in many cases of interest, the connectivity power-law behavior is neither related to dynamical properties nor to preferential attachment. Assigning a quenched fitness value x(i) to every vertex, and drawing links among vertices with a probability depending on the fitnesses of the two involved sites, gives rise to what we call a good-get-richer mechanism, in which sites with larger fitness are more likely to become hubs (i.e., to be highly connected). |
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