Coherent superconducting quantum pump

descriptionPublicationkeyboard_double_arrow_right Article , Preprint , Conference object 05 Apr 2012Embargo end date: 01 Jan 2011 United Kingdom, Finland English Publisher:American Physical Society (APS)Journal:Physical Review B, volume 85 (issn: 1098-0121, eissn: 1550-235X,

Copyright policy )Funded by:EC | GEOMDISS

Authors: Hoehne, F.; Pashkin, Yu.A.; Astafiev, O.V.; Möttönen, M.; Pekola, J.P.; Tsai; J.S.;

doi: 10.1103/physrevb.85.140504 , 10.48550/arxiv.1109.5543

arXiv: 1109.5543

Coherent superconducting quantum pump

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Abstract

We demonstrate non-adiabatic charge pumping utilizing a sequence of coherent oscillations between a superconducting island and two reservoirs. Our method, based on pulsed quantum state manipulations, allows to speedup charge pumping to a rate which is limited by the coupling between the island and the reservoirs given by the Josephson energy. Our experimental and theoretical studies also demonstrate that relaxation can be employed to reset the pump and avoid accumulation of errors due to non-ideal control pulses.

4 pages, 3 figures

Countries

United Kingdom, Finland

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Keywords

ta113, quantum pump, ta214, superconducting, ta114, Condensed Matter - Mesoscale and Nanoscale Physics, Condensed Matter - Superconductivity, ta221, 500, FOS: Physical sciences, 530, ta3112, ta3124, Superconductivity (cond-mat.supr-con), Mesoscale and Nanoscale Physics (cond-mat.mes-hall), ta515, ta218, ta217

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