Condensed Matter Theory   Universität Basel
Dr. Jörg Lehmann

Surmounting Oscillating Barriers

J. Lehmann, P. Reimann, and P. Hänggi

Phys. Rev. Lett. 84, 1639 (2000)

Preprint: arXiv:cond-mat/9911342

Thermally activated escape over a potential barrier in the presence of periodic driving is considered. By means of novel time-dependent path-integral methods we derive asymptotically exact weak-noise expressions for both the instantaneous and the time-averaged escape rate. The agreement with accurate numerical results is excellent over a wide range of driving strengths and driving frequencies.

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Uni Basel » Department of Physics » Condensed Matter Theory
last updated on 2008/03/19