Fast and accurate Cooper pair pump

Research output: Contribution to journalArticle

Researchers

Research units

  • Scuola Normale Super Pisa, Scuola Normale Superiore di Pisa, NEST
  • CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto Nanoscienze (NANO-CNR), Ist Nanosci
  • CNR, Consiglio Nazionale delle Ricerche (CNR), Istituto Nanoscienze (NANO-CNR), NEST, Ist Nanosci

Abstract

We propose a method to perform accurate and fast charge pumping in superconducting nanocircuits. Combining topological properties and quantum control techniques based on shortcuts to adiabaticity, we show that it is theoretically possible to achieve perfectly quantized charge pumping at any finite-speed driving. Model-specific errors may still arise due the difficulty of implementing the exact control. We thus assess this and other practical issues in a specific system comprised of three Josephson junctions. Using realistic system parameters, we show that our scheme can improve the pumping accuracy of this device by various orders of magnitude. Possible metrological perspectives are discussed.

Details

Original languageEnglish
Article number235428
Pages (from-to)1-11
Number of pages11
JournalPhysical Review B
Volume100
Issue number23
Publication statusPublished - 16 Dec 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • SINGLE-ELECTRON TRANSISTOR, QUANTIZED CURRENT

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