Fast and Accurate Single-Island Charge Pump: Implementation of a Cooper Pair Pump

Antti O. Niskanen, Jukka P. Pekola, and Heikki Seppä

Phys. Rev. Lett. 91, 177003 – Published 24 October 2003

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.

Received 1 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.177003

Authors & Affiliations

Antti O. Niskanen^1,2,*, Jukka P. Pekola², and Heikki Seppä¹

¹VTT Information Technology, Microsensing, POB 1207, 02044 VTT, Finland
²Low Temperature Laboratory, Helsinki University of Technology, POB 2200, FIN-02015 HUT, Finland

^*Electronic address: antti.niskanen@vtt.fi

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Vol. 91, Iss. 17 — 24 October 2003

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