Comparing the stationary states of a mechanical pendulum and of a small under-damped Josephson junction, parametric resonance in the latter system due to an oscillating magnetic field is studied by means of a Gedanken-experiment. A second conceptual experiment shows that for rapidly oscillating magnetic fields the superconducting phase difference $\phi$ across the junction in the absence of bias current can attain values of $\pm \pi$ in the vicinity of the lower lying stationary state at $\phi=0$.
Parametric resonance in small Josephson junctions in the presence of oscillating magnetic fields
DE LUCA, Roberto;FEDULLO, Aniello
2011
Abstract
Comparing the stationary states of a mechanical pendulum and of a small under-damped Josephson junction, parametric resonance in the latter system due to an oscillating magnetic field is studied by means of a Gedanken-experiment. A second conceptual experiment shows that for rapidly oscillating magnetic fields the superconducting phase difference $\phi$ across the junction in the absence of bias current can attain values of $\pm \pi$ in the vicinity of the lower lying stationary state at $\phi=0$.File in questo prodotto:
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