Stochastic dynamics of a Josephson junction threshold detector
arXiv:cond-mat/0611783 · doi:10.1103/PhysRevLett.98.136803
Abstract
We generalize the stochastic path integral formalism by considering Hamiltonian dynamics in the presence of general Markovian noise. Kramers' solution of the activation rate for escape over a barrier is generalized for non-Gaussian driving noise in both the overdamped and underdamped limit. We apply our general results to a Josephson junction detector measuring the electron counting statistics of a mesoscopic conductor. Activation rate dependence on the third current cumulant includes an additional term originating from the back-action of the measurement circuit.
5 pages, 2 figures, discussion of experiment added, typos corrected