Výsledky vyhledávání - "Oliveira, Glaucius Iahnke de"

Coherence and incoherence in extended broadband triplet interaction

Autor: Oliveira, Glaucius Iahnke de, Rizzato, Felipe Barbedo

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We study the transition from coherent to incoherent dynamics in a nonlinear triplet of broadband combs of waves. Expanding the analysis of previous works, we investigate what happens when the band of available modes is much larger than that of the in

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Nonlinear stability of solitons against strong external perturbations

Autor: Rizzato, Felipe Barbedo, Oliveira, Glaucius Iahnke de, Chian, Abraham Chian-Long

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We study soliton stability under the action of strong external perturbations. Limits on the weak perturbation approach are established with the help of average Lagrangian methods and full simulations. We found that for the same relative perturbation,

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Scaling laws for breathing frequencies of solitary modes in the Zakharov equations

Autor: Oliveira, Glaucius Iahnke de, Rizzato, Felipe Barbedo

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

We analyze typical time scales resulting from the coupled dynamics of high- and low-frequency wave components in solitary solutions of the Zakharov equations. Linear stability analysis around the solitary modes suggests that adiabatic regimes may be

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Length scale, quasiperiodicity, resonances, separatrix crossings, and chaos in the weakly relativistic Zakharov equations

Autor: Oliveira, Glaucius Iahnke de, Rizzato, Felipe Barbedo, Chian, Abraham Chian-Long

Publikováno v: Repositório Institucional da UFRGS
Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS

Nonlinear saturation of unstable solutions to the weakly relativistic, one-dimensional Zakharov equations is considered in this paper. In order to perform the analysis, two quantities are introduced. One of them, p* is proportional to the initial ene

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