The contact process on random hyperbolic graphs

Abstract

We consider the contact process on the model of hyperbolic random graph, in the regime when the degree distribution obeys a power law with finite mean and infinite second moment. We show that the probability of non-extinction as the rate of infection goes to zero decays as a power law with an exponent that only depends on the power law exponent and which is the same as in the configuration model, suggesting some universality of this critical exponent. We also consider finite versions of the hyperbolic graph and prove metastability results, as the size of the graph goes to infinity. Joint work with Amitai Linker, Dieter Mitsche and Bruno Schapira.

Date
Oct 9, 2020 4:00 PM