In this paper, we study the multicritical behavior of the Ginzburg–Landau model in a O(n1)⊕O(n2)-symmetric version containing (n1/2+n2/2)-complex order parameters coupled to a gauge field. We develop the RG analysis at a one-loop approximation in the context of the ϵ-expansion approach. The...

This paper examines the multicritical behavior of a generalized U(N1)×U(N2) Ginzburg–Landau theory containing two multicomponent complex fields which couple differently to two gauge fields described by two Maxwell terms and one mixed-Chern–Simons term. This model is relevant to the dynamics...