De maneira geral, o comportamento dinâmico de sistemas não lineares é caracterizado pela imprevisibilidade e extrema sensibilidade às condições iniciais e aos parâmetros do sistema. A sensibilidade dessas condições pode ...

We present a mechanism to generate a sequence of shearless curves or attractors to form a band of transport barriers. We consider the labyrinthic nontwist standard map to prepare a scenario with three shearless curves. ...

We present a new kind of one-dimensional attractor, which has not yet been predicted in the non-linear dynamics theory. We consider a non-linear map, which presents typical non-twist manifestations, as isochronous resonances ...

We consider a dissipative version of the standard nontwist map. It is known that nontwist systems may present a robust transport barrier, called shearless curve, that gives rise to an attractor that retains some of its ...

In this paper we present a set of generic results on Hamiltonian non-linear dynamics. We show the necessary conditions for a Hamiltonian system to present a non-twist scenario and from that we introduce the isochronous ...

A presença de barreiras de transporte em experimentos de confinamento magnético de plasma está associada a melhora no transporte das partículas. Através da aplicação de um potencial elétrico externo, chamado de bias, pode-se ...

Phenomena as reconnection scenarios, periodic-orbit collisions, and primary shearless tori have been recognized as features of nontwist maps. Recently, these phenomena and secondary shearless tori were analytically predicted ...

Shearless transport barriers appear in confined plasmas due to non-monotonic radial profiles and cause localized reduction of transport even after they have been broken. In this paper we summarize our recent theoretical ...