Stochastic Dynamics of a Josephson Junction Threshold Detector
Eugene V. Sukhorukov, Andrew N. Jordan
DOI 10.1103/PhysRevLett.98.136803 · Physical Review Letters
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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. The activation rate dependence on the third current cumulant includes an additional term originating from the backaction of the measurement circuit.
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