Moving discrete breathers in a -FPU lattice revisited
arXiv:2111.09167 · doi:10.1016/j.cnsns.2022.106435
Abstract
In the present work we revisit the existence, stability and dynamical properties of moving discrete breathers in -FPU lattices. On the existence side, we propose a numerical procedure, based on a continuation along a sequence of velocities, that allows to systematically construct breathers traveling more than one lattice site per period. On the stability side, we explore the stability spectrum of the obtained waveforms via Floquet analysis and connect it to the energy-frequency bifurcation diagrams. We illustrate in this context examples of the energy being a multivalued function of the frequency, showcasing the coexistence of different moving breathers at the same frequency. Finally, we probe the moving breather dynamics and observe how the associated instabilities change their speed, typically slowing them down over longtime simulations.
References in corpus (10)
- Discrete breathers in nonlinear lattices: Experimental detection in a Josephson array
- Observation of breathers in Josephson ladders
- Discrete Breathers in One-Dimensional Diatomic Granular Crystals
- Mobility and Reactivity of Discrete Breathers
- Optical manipulation of intrinsic localized vibrational energy in cantilever arrays
- Damped-Driven Granular Crystals: An Ideal Playground for Dark Breathers and Multibreathers
- Nonlinear localized modes in two-dimensional electrical lattices
- Discrete breathers in a nonlinear electric line: Modeling, Computation and Experiment
- Energy criterion for the spectral stability of discrete breathers
- Construction of nonlinear lattice with potential symmetry for smooth propagation of discrete breather