Surmounting oscillating barriers
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.
Lehmann
J
Universitat Augsburg, Institut fur Physik, Universitatsstrasse 1, D-86135 Augsburg, Germany.
Reimann
P
Hanggi
P