Experimental observation of the bifurcation dynamics of an intrinsic localized mode in a driven 1-D nonlinear lattice

Details Experimental observation of the bifurcation dynamics of an intrinsic localized mode in a driven 1-D nonlinear lattice Experimental observation of the bifurcation dynamics of an intrinsic localized mode in a driven 1-D nonlinear lattice

2011-10-31

arxiv.org/abs/1110.6677v1

Nonlinear Sciences

Pattern Formation and Solitons

4 pages, 5 figures. Accepted to PRL

Scientific paper

Linear response spectra of a driven intrinsic localized mode in a micromechanical array are measured as it approaches two fundamentally different kinds of bifurcation points. A linear phase mode associated with this autoresonant state softens in frequency and its amplitude grows as the upper frequency bifurcation point is approached, similar to the soft mode kinetic transition for a single driven Duffing resonator. A lower frequency bifurcation point occurs when the four-wave-mixing partner of this same phase mode intercepts the top of the extended wave branch, initiating a second kinetic transition process.

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