“…On the other hand, the case of (1+1) dimensions can be more easily investigated, hence the use of (1+1)-dimensional systems as simplified models. Note that it is an actively developing area, with many important results obtained recently: the topological defect deformation procedure [4,5], the construction of a topological defect carrying U(1) charge in a system with two scalar fields -one real and one complex [6,7], Q balls in scalar theories with U(1) symmetry [8,9], and many others. There are interesting results in scalar systems with an interaction with a spinor field [10][11][12].…”