36 citations · 234 across the 19 of their papers we have counts for
19 papers
Vortex-Antivortex Annihilation from BPS Equations
J. P. S. Neto, J. G. F. Campos, A. Mohammadi
In this work, we introduce a vortex-impurity model that admits BPS configurations containing both vortices and antivortices and allows vortex-antivortex annihilation to be describe…
Resonance with quasinormal modes in long-range kinks' collisions
J. G. F. Campos, Azadeh Mohammadi, T. Romanczukiewicz
We consider a rational scalar field model in (1+1)-dimensions where the long-range character of the kinks is controllable. We show via numerical simulations that kinks with long-ra…
Collective coordinates method for long-range kink collisions
J. G. F. Campos, A. Mohammadi, T. Romanczukiewicz
In this paper, we explored a class of potentials with three minima that support kink solutions exhibiting one long-range tail. We analyzed antikink-kink interactions using an effec…
On the localized and delocalized modes in kink-antikink interactions: a toy model
Carlos E. S. Santos, João G. F. Campos, Azadeh Mohammadi
This study deals with a piecewise scalar field theory in dimensions. The scalar field potential is designed with a triple-well shape, engendering kink solutions with…
Abelian Chern-Simons vortices in the presence of magnetic impurities
Dionisio Bazeia, João G. F. Campos, Azadeh Mohammadi
This work deals with Abelian Chern-Simons vortices interacting with magnetic impurities. We compute static solutions with winding numbers zero and one. Then, we develop a numerical…
Collisions between kinks with long-range tails: a simple and efficient method
João G. F. Campos, Azadeh Mohammadi
We construct initial configurations for the scattering between kinks with long-range tails. For this purpose, we exploit kink solutions in the presence of Bogomol'nyi-Prasad-Sommer…
Kink scattering in the presence of geometric constrictions
João G. F. Campos, Fabiano C. Simas, D. Bazeia
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 modi…
Kink-antikink collisions in the model: short-range to long-range journey
Dionisio Bazeia, João G. F. Campos, Azadeh Mohammadi
We studied kink-antikink collisions in (1+1)-dimensional spacetime for all symmetric models with four degenerate minima. Such a polynomial model has only one free param…
Fermionic spectral walls in kink collisions
João G. F. Campos, Azadeh Mohammadi, Jose M. Queiruga +2
We show that a spectral wall, i.e., an obstacle in the dynamics of a bosonic soliton, which arises due to the transition of a normal mode into the continuum spectrum, exists after…
Resonance mediated by fermions in kink-antikink collisions
Dionisio Bazeia, João G. F. Campos, Azadeh Mohammadi
We investigate generalizations of the and sine-Gordon models, including interactions with Dirac Fermions. We observe new resonance phenomena by taking the fermion back-reacti…
Kink-antikink collision in the supersymmetric model
João G. F. Campos, Azadeh Mohammadi
This paper investigates a model containing kinks interacting with fermions. The fermion back-reaction is included in the equations of motion, which affects the kink-antikink…
Interactions between topological defects in (1+1) dimensions
João G. F. Campos
In this thesis, we study interactions between topological defects in two-dimensional spacetimes. These defects are called kinks. They are solutions of scalar field theories with lo…
Fermions on wobbling kinks: normal versus quasinormal modes
João G. F. Campos, Azadeh Mohammadi
The system consisting of a fermion in the background of a wobbling kink is studied in this paper. To investigate the impact of the wobbling on the fermion-kink interaction, we empl…
Wobbling double sine-Gordon kinks
João G. F. Campos, Azadeh Mohammadi
We study the collision of a kink and an antikink in the double sine-Gordon model with and without the excited vibrational mode. In the latter case, we find that there is a limited…
Interaction between kinks and antikinks with double long-range tails
João G. F. Campos, Azadeh Mohammadi
We explore a class of models with kink and antikink solutions that have long-range tails on both sides, specializing to the cases with and . A recently develope…
Fermion transfer in the model with a half-BPS preserving impurity
João G. F. Campos, Azadeh Mohammadi
We study a fermion field coupled to a scalar via a Yukawa term. The scalar field is the model with an impurity that preserves half of the BPS property. We analyze the spectru…
Quasinormal modes in kink excitations and kink-antikink interactions: a toy model
João G. F. Campos, Azadeh Mohammadi
We study excitations and collisions of kinks in a scalar field theory where the potential has two minima with symmetry. The field potential is designed to create a square wel…
Stochastic oscillations produce dragon king avalanches in self-organized quasi-critical systems
O. Kinouchi, L. Brochini, A. A. Costa +2
In the last decade, several models with network adaptive mechanisms (link deletion-creation, dynamic synapses, dynamic gains) have been proposed as examples of self-organized criti…
Correlations Induced by Depressing Synapses in Critically Self-Organized Networks with Quenched Dynamics
João Guilherme Ferreira Campos, Ariadne de Andrade Costa, Mauro Copelli +1
In a recent work, mean-field analysis and computer simulations were employed to analyze critical self-organization in networks of excitable cellular automata where randomly chosen…