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. Moreover, we discuss a theoretical model, which allows characteristic features of the Lévy fluctuations to be extracted from a measured distribution of switching currents. In view of these results, this system can effectively find an application as a detector for a Lévy signal embedded in a noisy background.

Guarcello C., Valenti D., Spagnolo B., Pierro V., Filatrella G. (2019). Josephson-based Threshold Detector for Lévy-Distributed Current Fluctuations. PHYSICAL REVIEW APPLIED, 11(4), 044078-1-044078-9 [10.1103/PhysRevApplied.11.044078].

Josephson-based Threshold Detector for Lévy-Distributed Current Fluctuations

GUARCELLO, Claudio
;
Valenti D.;Spagnolo B.;
2019-04-24

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. Moreover, we discuss a theoretical model, which allows characteristic features of the Lévy fluctuations to be extracted from a measured distribution of switching currents. In view of these results, this system can effectively find an application as a detector for a Lévy signal embedded in a noisy background.
24-apr-2019
Settore FIS/03 - Fisica Della Materia
Guarcello C., Valenti D., Spagnolo B., Pierro V., Filatrella G. (2019). Josephson-based Threshold Detector for Lévy-Distributed Current Fluctuations. PHYSICAL REVIEW APPLIED, 11(4), 044078-1-044078-9 [10.1103/PhysRevApplied.11.044078].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/360426
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