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Updated: Aug 9, 2026

Silicon Metal-oxide-semiconductor Quantum Dots for Single-electron Pumping
Published on: June 3, 2015
Fast and accurate single-island charge pump: implementation of a cooper pair pump
Antti O Niskanen1, Jukka P Pekola, Heikki Seppä
1VTT Information Technology, Microsensing, POB 1207, 02044 VTT, Finland. antti.niskanen@vtt.fi
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.
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