Underdamped Josephson junction as a switching current detector

G. Oelsner, L.S. Revin, E. Il'ichev1, A.L. Pankratov (Corresponding Author), H.-G. Meyer, Leif Grönberg, Juha Hassel, L.S. Kuzmin

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    Abstract

    We demonstrate the narrow switching distribution of an underdamped Josephson junction from the zero to the finite voltage state at millikelvin temperatures. We argue that such junctions can be used as ultrasensitive detectors of the single photons in the GHz range, operating close to the quantum limit: a given initial (zero voltage) state can be driven by an incoming signal to the finite voltage state. The width of the switching distribution at a nominal temperature of about T = 10 mK was 4.5 nA, which corresponds to an effective noise temperature of the device below 60 mK.
    Original languageEnglish
    Article number142605
    JournalApplied Physics Letters
    Volume103
    Issue number14
    DOIs
    Publication statusPublished - 2013
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • electric sensing devices
    • superconducting device noise
    • superconducting junction devices
    • superconducting photodetectors

    Cite this

    Oelsner, G., Revin, L. S., Il'ichev1, E., Pankratov, A. L., Meyer, H-G., Grönberg, L., Hassel, J., & Kuzmin, L. S. (2013). Underdamped Josephson junction as a switching current detector. Applied Physics Letters, 103(14), [142605]. https://doi.org/10.1063/1.4824308