Switching path distribution in multi-dimensional systems

Details Switching path distribution in multi-dimensional systems Switching path distribution in multi-dimensional systems

2008-09-20

arxiv.org/abs/0809.3525v1

Physics

Condensed Matter

Statistical Mechanics

To appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.78.051109

We explore the distribution of paths followed in fluctuation-induced switching between coexisting stable states. We introduce a quantitative characteristic of the path distribution in phase space that does not require a priori knowledge of system dynamics. The theory of the distribution is developed and its direct measurement is performed in a micromechanical oscillator driven into parametric resonance. The experimental and theoretical results on the shape and position of the distribution are in excellent agreement, with no adjustable parameters. In addition, the experiment provides the first demonstration of the lack of time-reversal symmetry in switching of systems far from thermal equilibrium. The results open the possibility of efficient control of the switching probability based on the measured narrow path distribution.

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