Activation barrier scaling and crossover for noise-induced switching in a micromechanical parametric oscillator

Details Activation barrier scaling and crossover for noise-induced switching in a micromechanical parametric oscillator Activation barrier scaling and crossover for noise-induced switching in a micromechanical parametric oscillator

2006-09-15

arxiv.org/abs/cond-mat/0609394v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.99.060601

We explore fluctuation-induced switching in a parametrically-driven micromechanical torsional oscillator. The oscillator possesses one, two or three stable attractors depending on the modulation frequency. Noise induces transitions between the coexisting attractors. Near the bifurcation points, the activation barriers are found to have a power law dependence on frequency detuning with critical exponents that are in agreement with predicted universal scaling relationships. At large detuning, we observe a crossover to a different power law dependence with an exponent that is device specific.

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