Fast and accurate single-island charge pump: Implementation of a Cooper pair pump

Antti Niskanen, Jukka Pekola, Heikki Seppä

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    54 Citations (Scopus)

    Abstract

    We introduce a Cooper pair “sluice” for the implementation of a frequency-locked current source. The device consists of two mesoscopic SQUIDs and of a single superconducting island with a gate. We demonstrate theoretically that it is possible to obtain a current as high as 0.1 nA at better than ppm accuracy via periodically modulating both the gate charge and the effective Josephson coupling. We find that the device is tolerant against background charge noise and operates well even in a dissipative environment. The effect of the imperfect suppression of the Josephson coupling and the finite operating frequency are also investigated.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume91
    Issue number17
    DOIs
    Publication statusPublished - 2003
    MoE publication typeA1 Journal article-refereed

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    Keywords

    • Cooper pair pumping
    • Cooper pairs
    • SQUID
    • Josephson effect
    • Josephson junction

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