Small Josephson junction as detector of non-Gaussian noise

René Lindell, Mika Sillanpää, Tero Heikkilä, Julien Delahaye, Takahide Yamaguchi, edouard Sonin, Pertti Hakonen

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

    Abstract

    The current in a a Coulomb blockaded Josephson junction is sensitive to voltage or phase fluctuations in its electromagnetical environment. This property can be used to detect noise also from non-Gaussian noise sources. We have experimentally studied IV-curves of as a function of the shot noise current in a nearby tunnel junction. We observe a linear enhancement of zero-bias conductance of the Josephson junction as a function of the shot noise power. Furthermore, with increasing shot noise power, the IV-curves becomes asymmetric with a shift of minimum conductance and the appearance of a local conductance maximum. A quantitative explanation for the asymmetric features due to the non-Gaussian noise sources is still an open question. There is also motivation to pursue modifications of the current scheme in order to detect individual statistical moments of noise and to connect different noise sources to the Josephson junction. © 2005 American Institute of Physics.

    Original languageEnglish
    Title of host publication4th International Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology and High Technology
    Pages563-568
    Number of pages6
    DOIs
    Publication statusPublished - 2005
    MoE publication typeA4 Article in a conference publication
    EventInternational Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology and High Technology - Gallipoli, Italy
    Duration: 6 Jun 200510 Jun 2005
    Conference number: 4

    Publication series

    Name AIP CONFERENCE PROCEEDINGS
    Volume800
    ISSN (Print)0094-243X

    Conference

    ConferenceInternational Conference on Unsolved Problems of Noise and Fluctuations in Physics, Biology and High Technology
    Abbreviated titleUPoN
    CountryItaly
    CityGallipoli
    Period06/06/200510/06/2005

    Keywords

    • Josephson junction
    • Non-Gaussian
    • Shot noise

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