Enhancement of coherent response by quenched disorder.
We investigate the effects of quenched disorder on the coherent response in a driven system of coupled oscillators. In particular, the interplay between quenched noise and periodic driving is explored, with particular attention to the possibility of resonance. The phase velocity is examined as the response of the system; revealed is the enhancement of the fraction of oscillators locked to the periodic driving, displaying resonance behavior. It is thus concluded that resonance behavior may also be induced by quenched disorder that does not have time-dependent correlations.
Hong
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Department of Physics, Chonbuk National University, Jeonju 561-756, Korea.