title: Transport properties in nontwist area-preserving maps.
abstract: Nontwist systems, common in the dynamical descriptions of fluids and plasmas, possess a shearless curve with a concomitant transport barrier that eliminates or reduces chaotic transport, even after its breakdown. In order to investigate the transport properties of nontwist systems, we analyze the barrier escape time and barrier transmissivity for the standard nontwist map, a paradigm of such systems. We interpret the sensitive dependence of these quantities upon map parameters by investigating chaotic orbit stickiness and the associated role played by the dominant crossing of stable and unstable manifolds.
authors.affiliation: Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo, 05315-970 Sao Paulo, Brazil.
authors.forename: J D
authors.initials: JD
authors.lastname: Szezech
authors.forename: I L
authors.initials: IL
authors.lastname: Caldas
authors.forename: S R
authors.initials: SR
authors.lastname: Lopes
authors.forename: R L
authors.initials: RL
authors.lastname: Viana
authors.forename: P J
authors.initials: PJ
authors.lastname: Morrison
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D017711:Nonlinear Dynamics; D012212:Rheology / Q000379:methods*; D033081:Shear Strength