Escape rate of metastable states in a driven NbN superconducting microwave resonator

Details Escape rate of metastable states in a driven NbN superconducting microwave resonator Escape rate of metastable states in a driven NbN superconducting microwave resonator

2006-07-25

arxiv.org/abs/cond-mat/0607628v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1063/1.2722241

We study thermal instability and formation of local hot spots in a driven nonlinear NbN superconducting microwave resonator. White noise injected into the resonator results in transitions between the metastable states via a process consisting of two stages. In the first stage, the input noise entering the system induces fluctuations in the resonator mode. While, in the second one, these mode fluctuations result in phase transitions of the hot spot due to induced temperature fluctuations. The associated noise-activated escape rate is calculated theoretically, and also measured experimentally by means of driving the system into stochastic resonance. A comparison between theory and experiment yields a partial agreement.

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