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arXiv · 1802.01095

Josephson-based threshold detector for Lévy distributed fluctuations

Claudio Guarcello·Davide Valenti·Bernardo Spagnolo·Vincenzo Pierro·Giovanni Filatrella
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Abstract

We propose a threshold detector for Lévy distributed fluctuations based on a Josephson junction. The Lévy noise current added to a linearly ramped bias current results in clear changes in the distribution of switching currents out of the zero-voltage state of the junction. We observe that the analysis of the cumulative distribution function of the switching currents supplies information on both the characteristics shape parameter $α$ of the Lévy statistics and the intensity of the fluctuations. Moreover, we discuss a theoretical model which allows to extract characteristic features of the Lévy fluctuations from a measured distribution of switching currents. In view of this results, this system can effectively find an application as a detector for a Lévy signal embedded in a noisy background.

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Claudio Guarcello, Davide Valenti, Bernardo Spagnolo, Vincenzo Pierro, Giovanni Filatrella. 2019-04-24. Josephson-based threshold detector for Lévy distributed fluctuations. https://doi.org/10.1103/physrevapplied.11.044078

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