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RESEARCH PRODUCT
Josephson-based Threshold Detector for Lévy-Distributed Current Fluctuations
Bernardo SpagnoloBernardo SpagnoloGiovanni FilatrellaClaudio GuarcelloClaudio GuarcelloDavide ValentiVincenzo Pierrosubject
Josephson effect---Current (mathematics)NOISE; FLIGHTS; FLUORESCENCE; LIFETIME; MODEL; STATE; FIELDGeneral Physics and Astronomy02 engineering and technologyLIFETIMEFault (power engineering)01 natural sciencesNoise (electronics)Settore FIS/03 - Fisica Della MateriaNOISE0103 physical sciencesStatistical physicsSuperconducting electronicsFLUORESCENCEFIELD010306 general physicsPhysicsResistive touchscreenDetectorFLIGHTSState (functional analysis)Josephson junctions Lévy processes non-thermal noise current fluctuations021001 nanoscience & nanotechnologySTATEMODEL0210 nano-technologydescription
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-04-24 |