Single Cooper-pair pumping in the adiabatic limit and beyond

S. Gasparinetti, P. Solinas, Y. Yoon, J.P. Pekola

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)
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Abstract

We demonstrate controlled pumping of Cooper pairs down to the level of a single pair per cycle, using an rf-driven Cooper-pair sluice. We also investigate the breakdown of the adiabatic dynamics in two different ways. By transferring many Cooper pairs at a time, we observe a crossover between pure Cooper-pair and mixed Cooper-pair-quasiparticle transport. By tuning the Josephson coupling that governs Cooper-pair tunneling, we characterize Landau-Zener transitions in our device. Our data are quantitatively accounted for by a simple model including decoherence effects.
Original languageEnglish
Article number060502
Pages (from-to)1-5
Number of pages5
JournalPhysical Review B
Volume86
Issue number6
DOIs
Publication statusPublished - 2 Aug 2012
MoE publication typeA1 Journal article-refereed

Keywords

  • adiabatic limit
  • Cooper-pair pumping
  • Landau-Zener transition
  • superconductor system

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