Characterisation of Cooper pair boxes for quantum computing

J. J. Toppari*, K. Hansen, N. Kim, M. T. Savolainen, L. Taskinen, J. P. Pekola

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

We have measured and characterised superconducting single Cooper pair boxes (SCB) using superconducting single electron transistor (SET) fabricated on the same chip as an electrometer. The electrometer is sensitive to the potential changes of the SCB island and thus measures the number of excess Cooper pairs on the island. The boxes were of the Al/AlOx/Al Josephson junction type. The SCB and SET were characterised separately and the box storage performance for Cooper pairs was analysed by observing the changes in the SCB island potential while sweeping the gate voltage.

Original languageEnglish
Pages (from-to)177-180
Number of pages4
JournalPHYSICA C: SUPERCONDUCTIVITY AND ITS APPLICATIONS
Volume352
Issue number1-4
DOIs
Publication statusPublished - Apr 2001
MoE publication typeA1 Journal article-refereed

Keywords

  • Cooper pair box
  • Cooper pair pump
  • Josephson junctions
  • Quantum bits
  • Tunneling

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