Arrayas, M. and Khovanov, I. A. and Luchinsky, D. G. and Mannella, R. and McClintock, Peter V. E. and Greenall, M. and Sabbagh, H. (2000) Experimental studies of the non-adiabatic escape problem. AIP Conference Proceedings, 502. pp. 20-25. ISSN 0094-243X
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Abstract
Noise-induced transitions between coexisting stable states of a periodically driven nonlinear oscillator have been investigated by means of analog experiments and numerical simulations in the nonadiabatic limit for a wide range of oscillator parameters. It is shown that, for over-damped motion, the field-induced corrections to the activation energy can be described quantitatively in terms of the logarithmic susceptibility (LS) and that the measured frequency dispersion of the corresponding corrections for a weakly damped nonlinear oscillator is in qualitative agreement with the theoretical prediction. Resonantly directed diffusion is observed in numerical simulations of a weakly damped oscillator. The possibility of extending the LS approach to encompass escape from the basin of attraction of a quasi-attractor is discussed.