Criticality of the $O(2)$ model with cubic anisotropies from nonperturbative renormalization

Andrzej Chlebicki, Pawel Jakubczyk

We study the $O(2)$ model with ${\mathbb{Z}}_4$-symmetric perturbations within the framework of nonperturbative renormalization group (RG) for spatial dimensionality $d=2$ and $d=3$.…