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arXiv · 1406.0945

Modulational instability and resonant wave modes act on the metastability of oscillator chains

Torsten Gross·Dirk Hennig·Lutz Schimansky-Geier
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Abstract

We describe the emergence and interactions of breather modes and resonant wave modes within a two-dimensional ring-like oscillator chain in a microcanonical situation. Our analytical results identify different dynamical regimes characterized by the potential dominance of either type of mode. The chain is initially placed in a meta-stable state which it can leave by passing over the brim of the applied Mexican-hat-like potential. We elucidate the influence of the different wave modes on the mean-first passage time. A central finding is that also in this complex potential landscape a fast noise-free escape scenario solely relying on nonlinear cooperative effects is accomplishable even in a low energy setting.

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Torsten Gross, Dirk Hennig, Lutz Schimansky-Geier. 2014-06-04. Modulational instability and resonant wave modes act on the metastability of oscillator chains. https://doi.org/10.1103/physreve.90.032919

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