Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Simas, Fabiano C."'
In this work, we investigate the dynamics of a scalar field in the nonintegrable $\displaystyle \phi ^{4}$ model, restricted to the half-line. Here we consider singular solutions that interpolate the Dirichlet boundary condition $\phi(x=0,t)=H$ and t
Externí odkaz:
http://arxiv.org/abs/2411.04343
We consider an extended model with two real scalar fields, $\phi(x,t)$ and $\chi(x,t)$. The first sector is controlled by the sine-Gordon superpotential, while the second field is submitted to the $\chi^4$ one. The fields mutually interact via a nont
Externí odkaz:
http://arxiv.org/abs/2411.00512
Autor:
Gomes, Adalto R., Simas, Fabiano C.
In this paper, we present topological defects in $(1,1)$ dimensions, described by an extended nonlinear $O(3)$ sigma model. We consider spherical coordinates $(\phi,\chi)$ in the $S^2$ isotopic space and a potential $V(\phi,\chi)$. For specific forms
Externí odkaz:
http://arxiv.org/abs/2410.10445
Autor:
Bazeia, Dionisio, Simas, Fabiano C.
Publikováno v:
Eur. Phys. J. C 84 (2024) 1039L
The Yukawa coupling of fermions with a periodic bosonic background is shown to give rise to several bound states to the fermionic spectrum, with some bound states gluing together around specific energy eingenvalues as the Yukawa coupling increases. T
Externí odkaz:
http://arxiv.org/abs/2410.00305
Autor:
Simas, Fabiano C., da Hora, E.
We examine the oscillon decay in a model with a single scalar field and two asymmetric fundamental states. Specifically, we verify how the evolution of an initially excited oscillon leads to the formation of antikink-kink pairs in the presence of a c
Externí odkaz:
http://arxiv.org/abs/2404.17848
Publikováno v:
Annals of Physics, Volume 470, November 2024, 169777
Higher-order scalar field models in two dimensions, including the $\phi^8$ model, have been researched. It has been shown that for some special cases of the minima positions of the potential, the explicit kink solutions can be found. However, in phys
Externí odkaz:
http://arxiv.org/abs/2402.00270
Publikováno v:
JHEP 10 (2023) 124
We investigate kink-antikink collisions in a model characterized by two scalar fields in the presence of geometric constrictions. The model includes an auxiliary function that modifies the kinematics associated with one of the two fields. An importan
Externí odkaz:
http://arxiv.org/abs/2306.08802
Publikováno v:
Chaos, Solitons and Fractals 164 (2022) 112723
Two hyperbolic-deformed field theoretic models are discussed. In both of them, due to the effect of specific deformation function on the well known $\varphi^4$ and $\varphi^6$ models, their internal structure may change significantly. Unlike the $\va
Externí odkaz:
http://arxiv.org/abs/2207.00835
Publikováno v:
Chaos, Solitons and Fractals 161 (2022) 112387
This work deals with bifurcation and the chaotic behavior in one dimensional chains of small particles. We consider two distinct possibilities, one where the particles are modeled by a fourth-order potential which was already studied. We revisit this
Externí odkaz:
http://arxiv.org/abs/2206.12734
Publikováno v:
IJMPA, Vol. 38, No. 15n16, 2350083 (2023)
In this paper we analyze the scattering process in a two-field model in $(1+1)$-dimensions, with the special property to have several topological solutions: i) one with higher rest mass, characterized by a nested defect (lump inside a kink), and ii)
Externí odkaz:
http://arxiv.org/abs/2201.03372