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Detecting Current Noise with a Josephson Junction in the Macroscopic Quantum Tunneling Regime

J. T. Peltonen·A. V. Timofeev·M. Meschke·J. P. Pekola
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Abstract

We discuss the use of a hysteretic Josephson junction to detect current fluctuations with frequencies below the plasma frequency of the junction. These adiabatic fluctuations are probed by switching measurements observing the noise-affected average rate of macroscopic quantum tunneling of the detector junction out of its zero-voltage state. In a proposed experimental scheme, frequencies of the noise are limited by an on-chip filtering circuit. The third cumulant of current fluctuations at the detector is related to an asymmetry of the switching rates.

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J. T. Peltonen, A. V. Timofeev, M. Meschke, J. P. Pekola. 2006-11-22. Detecting Current Noise with a Josephson Junction in the Macroscopic Quantum Tunneling Regime. https://doi.org/10.1007/s10909-006-9272-y

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