Nonextensive percolation and Lee-Yang edge singularity from nonextensive λϕ3 scalar field theory

Abstract

We compute the critical exponents for nonextensive λϕ3 scalar field theory for all loop orders and |q−1|<1. We apply the results for both nonextensive percolation and Lee-Yang edge singularity problems. The corresponding systems are nonextensive generalizations of their extensive counterparts. For that we employ tools from the recently introduced nonextensive statistical field theory. The results for the nonextensive critical exponents computed depend on the nonextensive parameter q, which encodes global correlations among the degrees of freedom of the system. The extensive results are recovered in the limit q→1. There is an interplay between global correlations and fluctuations, once the nonextensive critical exponents depend on q. This dependence is in agreement with the universality hypothesis.