Impurity-Induced Stabilization of Solitons in Arrays of Parametrically Driven Nonlinear Oscillators
Impurity-Induced Stabilization of Solitons in Arrays of Parametrically Driven Nonlinear Oscillators
Chains of parametrically driven, damped pendula are known to support solitonlike clusters of in-phase motion which become unstable and seed spatiotemporal chaos for sufficiently large driving amplitudes. We show that the pinning of the soliton on a "long" impurity (a longer pendulum) expands dramatically its stability region, whereas "short" defects …