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Coherent superconducting quantum pump

Research output: Contribution to journalJournal article

  • Felix Hoehne
  • Yuri A. Pashkin
  • Oleg V. Astafiev
  • Mikko Mottonen
  • Jukka P. Pekola
  • JawShen Tsai
Article number140504
<mark>Journal publication date</mark>5/04/2012
<mark>Journal</mark>Physical Review B
Issue number14
Number of pages5
Pages (from-to)-
<mark>Original language</mark>English


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.