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A Josephson junction as a detector of Poissonian charge injection

J. P. Pekola
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Abstract

We propose a scheme of measuring the non-Gaussian character of noise by a hysteretic Josephson junction in the macroscopic quantum tunnelling (MQT) regime. We model the detector as an (under)damped $LC$ resonator. It transforms Poissonian charge injection into current through the detector, which samples the injection statistics over a floating time window of length $\sim Q/ω_{\rm J}$, where $Q$ is the quality factor of the resonator and $ω_{\rm J}$ its resonance frequency. This scheme ought to reveal the Poisson character of charge injection in a detector with realistic parameters.

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J. P. Pekola. 2004-03-28. A Josephson junction as a detector of Poissonian charge injection. https://doi.org/10.1103/physrevlett.93.206601

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