We investigate the presence of topological structures and multiple phase transitions in the O
(3)-sigma model with the gauge field governed by Maxwell's term and subject to a so-called …

To investigate possible topological vortex structures in generalized models, we developed a
perturbative generation approach for scalar-vector theories. We demonstrate explicitly that …

For the study of topological vortices with non-minimal coupling, we built a kind of non-
canonical O (3)-sigma model, with a Maxwell term modified by a dielectric function. Through …

In this work, a possible description for quantum dynamics of the cuscuton within the sigma-
model approach is presented. Lower order perturbative corrections and the structure of …

The topological structures of a ϕ 6 theory with multi-field are studied. The ϕ 6 theory is
interesting because it is a theory that allows the shrinkage of topological structures …

Using a spherically symmetric ansatz, we show that the Chern–Simons O (3)-sigma model
with a logarithmic potential admits topological solutions. This result is quite interesting since …

We investigate the influence of the matter field and the gauge field on the metric functions of
the AdS 3 spacetime of the Maxwell–Higgs model. By considering a matter field with a …

In this work, we propose an exponentially generalized Abelian model. We investigated the
presence of vortex structures in models coupled to Maxwell and Chern-Simons fields. We …

We investigate the presence of vortex structures in a Maxwell model with a logarithmic
generalization. This generalization becomes important because it generates stationary field …

Antes de começar a discutir o tema e o propósito desta tese, deixo abaixo o seguinte trecho
da música Trem-Bala como reflexão:“Não é sobre chegar no topo do mundo e saber que …