Kink variety in systems of two coupled scalar fields in two space-time dimensions

Abstract

In this paper we describe the moduli space of kinks in a class of systems of two coupled real scalar fields in $1+1$ Minkowskian space-time. The main feature of the class is the spontaneous breaking of a discrete symmetry of (real) Ginzburg-Landau type that guarantees the existence of kink topological defects.