Transforming kinks into compactons in the O(3)-sigma model

• Published in: Annals of physics 2020-11, Vol.422, p.168315, Article 168315
• Main Authors: Lima, F.C.E., Gomes, D.A., Almeida, C.A.S.
• Format: Article
• Language: English
• Subjects: [formula omitted]-sigma model; Compactons; Hyperbolic potential
• ISSN: 0003-4916; 1096-035X
• DOI: 10.1016/j.aop.2020.168315

In this work, we investigate the solutions of vortices in the O(3)-sigma model with the gauge field governed by the Chern–Simons term and subject to a hyperbolic self-dual potential. We show that this model admits both topological and nontopological soliton solutions. Employing numerical analysis, we realize that the topological solutions of the model can be transformed into compacton-like solutions. On the other hand, after modifying the model by the introduction of a dielectric constant, an exciting feature appears; namely, the nontopological solutions can be transformed into kink-like solutions through the numerical variation of the dielectric constant. Furthermore, we discuss the degeneracy for the topological solitons in a given sector. Finally, we present the numerical solutions of the first model. •The O(3)-sigma model with a self-dual hyperbolic potential is considered.•We transform solitons into compacton-like using a numerical approach.•We modify the model introducing a “screening constant,” and for different values of the constant, can be obtained topological or compacton-like solutions.