期刊
PHYSICAL REVIEW LETTERS
卷 84, 期 14, 页码 3053-3056出版社
AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.84.3053
关键词
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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 simply repel solitons producing an effective partition of the chain. We also show that defects may spontaneously nucleate solitons.
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