Adiabatic quantum pumping at the Josephson frequency

S. Russo; J. Tobiska; T. M. Klapwijk; A. F. Morpurgo

doi:10.1103/physrevlett.99.086601

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arXiv · 0704.2590

Adiabatic quantum pumping at the Josephson frequency

S. Russo·J. Tobiska·T. M. Klapwijk·A. F. Morpurgo

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Abstract

We analyze theoretically adiabatic quantum pumping through a normal conductor that couples the normal regions of two superconductor/normal metal/superconductor Josephson junctions. By using the phases of the superconducting order parameter in the superconducting contacts as pumping parameters, we demonstrate that a non zero pumped charge can flow through the device. The device exploits the evolution of the superconducting phases due to the ac Josephson effect, and can therefore be operated at very high frequency, resulting in a pumped current as large as a few nanoAmperes. The experimental relevance of our calculations is discussed.

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S. Russo, J. Tobiska, T. M. Klapwijk, A. F. Morpurgo. 2007-04-19. Adiabatic quantum pumping at the Josephson frequency. https://doi.org/10.1103/physrevlett.99.086601

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