Coherent superconducting quantum pump

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© 2012 American Physical Society (APS). http://www.aps.org/
Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2012
Major/Subject
Mcode
Degree programme
Language
en
Pages
140504/1-5
Series
Physical Review B, Volume 85, Issue 14
Abstract
We demonstrate nonadiabatic charge pumping utilizing a sequence of coherent oscillations between a superconducting island and two reservoirs. The pumping rate for each elementary cycle is limited by the coupling between the island and the reservoirs given by the Josephson energy. Our experimental and theoretical studies show that relaxation can be employed to reset the pump in order to avoid accumulation of errors due to nonideal control pulses. Thus our results demonstrate the effects of nonadiabatic quantum pumping and dissipation.
Description
Keywords
superconducting, quantum pumps
Other note
Citation
Hoehne, Felix & Pashkin, Yuri A. & Astafiev, Oleg V. & Möttönen, Mikko & Pekola, Jukka & Tsai, JawShen. 2012. Coherent superconducting quantum pump. Physical Review B. Volume 85, Issue 14. P. 140504/1-5. ISSN 1098-0121 (printed). DOI: 10.1103/physrevb.85.140504.