Search Results - "Nobrega, K.Z."

Kink scattering in a hybrid model by Bazeia, D., Gomes, Adalto R., Nobrega, K.Z., Simas, Fabiano C.

“…In this work we consider a model where the potential has two topological sectors connecting three adjacent minima, as occurs with the ϕ6 model. In each…”
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Oscillons in hyperbolic models by Bazeia, D., Gomes, Adalto R., Nobrega, K.Z., Simas, Fabiano C.

“…In this work we examine kink-antikink collisions in two distinct hyperbolic models. The models depend on a deformation parameter, which controls two main…”
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Scattering of metastable lumps in a model with a false vacuum by Lima, Fred C., Simas, Fabiano C., Nobrega, K.Z., Gomes, Adalto R.

“…In this work we consider the scalar field model with a false vacuum proposed by Avelar et al. (2008) [27]. The model depends on a parameter s>0. The model has…”
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On the localized superluminal solutions to the Maxwell equations by Recami, E., Zamboni-Rached, M., Nobrega, K.Z., Dartora, C.A., Hernandez F, H.E.

“…The various experimental sectors of physics in which superluminal motions seem to appear are briefly mentioned. In particular, a bird's-eye view is presented…”
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Bifurcation and chaos in one dimensional chains of small particles by Simas, Fabiano C., Nobrega, K.Z., Bazeia, D.

“…This work deals with bifurcation and the chaotic behavior in one dimensional chains of small particles. We consider two distinct possibilities, one where the…”
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Degenerate vacua to vacuumless model and kink–antikink collisions by Simas, F.C., Gomes, Adalto R., Nobrega, K.Z.

“…In this work we investigate a Z2 symmetric model of one scalar field ϕ in (1,1) dimension. The model is characterized by a continuous transition from a…”
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Degenerate vacua to vacuumless model and kinkâantikink collisions by F.C. Simas, Adalto R. Gomes, K.Z. Nobrega

“…In this work we investigate a Z2 symmetric model of one scalar field Ï in (1,1) dimension. The model is characterized by a continuous transition from a…”
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Tunable two-photon THz emissions through pair annihilation in graphene with a double gate structure by Dartora, C.A., Zanella, Fernando, Nobrega, K.Z., Thomazi, Fabiano, Pavan, Havena Louise, de Lima, Ariane A., Pereira Menezes, Natalia, Montanheiro, Lecio V., Vargas, Juliana F., Burkarter, E., Mariano, Andre A.

“…How far the analogy between massless Dirac fermions in a truly relativistic (1+2)-D spacetime and electrons near the Fermi level in graphene can be seriously…”
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Spatio-temporal finite-element propagator for ultrashort optical pulses by Bravo-Roger, L.L., Nobrega, K.Z., Hernandez-Figueroa, H.E., Lopez-Barbero, A.P.

“…An efficient finite-element formulation for the simulation of ultrashort optical pulses is thoroughly presented. This numerical propagator, capable to take…”
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Comment on "Efficient time-domain beam-propagation method for modeling integrated optical devices" by Bravo-Roger, L.L., Zamboni-Rached, M., Nobrega, K.Z., Lopez-Barbero, A.P., Hernandez-Figueroa, H.E.

“…For original paper see H.M. Masoudi et al., ibid., vol.19, p.759-71 (2001). The commenters discuss an equation to describe the propagation of a bidimensional…”
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Conceitos básicos sobre a difração e a dispersão de ondas eletromagnéticas by C.A. Dartora, K.Z. Nobrega, Marina H. Krisam Matielli, Fillipi Klos Rodrigues de Campos, H. Tertuliano dos Santos Filho

“…O objetivo deste trabalho é apresentar os conceitos básicos relacionados aos fenômenos de difração e dispersão, permitindo ao leitor perceber as diferenças…”
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The effect of gradually constricted channel on the I–V characteristics of graphene sheets by Zanella, Fernando, Nobrega, K.Z., Dartora, C.A.

“…Ideal graphene is a gapless semiconductor consisting of a single layer of carbon atoms regularly arranged in a honeycomb lattice having infinite spatial extent…”
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Aspectos gerais da teoria da difração sob o ponto de vista de um princípio de incerteza by C.A. Dartora, K.Z. Nobrega, V.F. Montagner, Armando Heilmann, Horacio Tertuliano S. Filho

“…Dá-se o nome difração a um conjunto de fenômenos de natureza inerentemente ondulatória caracterizado pelo encurvamento, alargamento espacial e interferência de…”
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Charge and spin current oscillations in a tunnel junction induced by magnetic field pulses by Dartora, C.A., Nobrega, K.Z., Cabrera, G.G.

“…Usually, charge and spin transport properties in tunnel junctions are studied in the DC bias regime and/or in the adiabatic regime of time-varying magnetic…”
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Study of Gaussian and Bessel beam propagation using a new analytic approach by Dartora, C.A., Nobrega, K.Z.

“…The main feature of Bessel beams realized in practice is their ability to resist diffractive effects over distances exceeding the usual diffraction length. The…”
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Optical analogue of the Aharonov–Bohm effect using anisotropic media by Dartora, C.A., Nobrega, K.Z., Cabrera, G.G.

“…We show that in the context of paraxial optics, which can be analyzed through a wave equation similar to the non-relativistic Schrödinger equation of quantum…”
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Perturbative effects of antenna radiation reaction on artificial satellite orbit by Heilmann, A., Ferreira, Luiz Danilo Damasceno, Dartora, C.A., Nobrega, K.Z.

“…The actual orbital trajectory of an artificial satellite is very sensitive to a large number of disturbances, whose effects add to the main force exerted by…”
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Antenna radiation effects on the orbits of GPS and INTELSAT satellites by Heilmann, A., Ferreira, L.D.D., Dartora, C.A., Nobrega, K.Z.

“…A large number of disturbances add to the main force exerted by Earth's gravitational field and affect the actual orbital trajectory of artificial satellites…”
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Analysis of soliton switching in dispersion-decreasing fiber couplers by da Silva, M.G., Nóbrega, K.Z., Sombra, A.S.B.

“…We present an analytical and numerical investigation of the propagation and the switching of fundamental solitons in a two-core nonlinear fiber coupler…”
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A general theory for the Frozen Waves and their realization through finite apertures by Dartora, C.A., Nobrega, K.Z., Dartora, Alexandre, Viana, Gustavo A., Filho, HoracioTertuliano S.

“…In this paper, we present a generalization of the so-called Frozen Waves, which are new solutions to Maxwell’s equations having the important characteristic of…”
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