Abstract
Experiments on noise-induced escape of a mesoscopic particle in a double-well potential are described. The potential is created by the interaction of two focused laser beams with a single sub-micrometer dielectric particle. By mapping the 3-dimensional trapping potential, the eigenfrequencies of the trapped particle are found. Over-barrier transitions are directly measured as a function of the rate and amplitude of a modulation that periodically tilts the potential. At low modulation rates and amplitudes the particle follows the potential adiabatically. As the system approaches its saddle-node bifurcation, different scaling regions emerge, each characterized by distinctive power-laws as predicted by recent theories. Of particular interest is the presence of a weakly non-adiabatic region with novel critical behavior.
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Kruse, J., Ryvkine, D., Dykman, M., Golding, B. (2006). Nonadiabaticity in Modulated Optical Traps. In: Baglio, S., Bulsara, A. (eds) Device Applications of Nonlinear Dynamics. Understanding Complex Systems. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-33878-0_3
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DOI: https://doi.org/10.1007/3-540-33878-0_3
Publisher Name: Springer, Berlin, Heidelberg
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