12,000

We have over 12,000 students, from over 100 countries, within one of the safest campuses in the UK

93%

93% of Lancaster students go into work or further study within six months of graduating

Home > Research > Publications & Outputs > Coherent superconducting quantum pump
View graph of relations

« Back

Coherent superconducting quantum pump

Research output: Contribution to journalJournal article

Published

  • Felix Hoehne
  • Yuri A. Pashkin
  • Oleg V. Astafiev
  • Mikko Mottonen
  • Jukka P. Pekola
  • JawShen Tsai
???articleNumber???140504
Journal publication date5/04/2012
JournalPhysical Review B
Journal number14
Volume85
Number of pages5
Pages-
Original languageEnglish

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.