J ul 2 00 1 Pattern formation and localization in the forced-damped FPU lattice

Abstract

We study spatial pattern formation and energy localization in the dynamics of an anharmonic chain with quadratic and quartic intersite potential subject to an optical, sinusoidally oscillating field and a weak damping. The zoneboundary mode is stable and locked to the driving field below a critical forcing that we determine analytically using an approximate… (More)

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