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Characterisation of Cooper Pair Boxes for Quantum Bits

In: Macroscopic Quantum Coherence and Quantum Computing

Author

Listed:
  • M. T. Savolainen

    (University of Jyväskylä, Department of Physics)

  • J. J. Toppari

    (University of Jyväskylä, Department of Physics)

  • L. Taskinen

    (University of Jyväskylä, Department of Physics)

  • N. Kim

    (University of Jyväskylä, Department of Physics)

  • K. Hansen

    (University of Jyväskylä, Department of Physics)

  • J. P. Pekola

    (University of Jyväskylä, Department of Physics)

Abstract

We have fabricated and measured single Cooper pair boxes (SCB) using superconducting single electron transistors (SET) as electrometers. The box storage performance for Cooper pairs was measured by observing the changes in the SCB island potential. We are also fabricating niobium structures, which are expected to have less problems with quasiparticle contamination than similar aluminium based devices because of the high critical temperature. The use of niobium may also reduce decoherence and thereby increase the time available for quantum logic operations.

Suggested Citation

  • M. T. Savolainen & J. J. Toppari & L. Taskinen & N. Kim & K. Hansen & J. P. Pekola, 2001. "Characterisation of Cooper Pair Boxes for Quantum Bits," Springer Books, in: Dmitri V. Averin & Berardo Ruggiero & Paolo Silvestrini (ed.), Macroscopic Quantum Coherence and Quantum Computing, pages 165-172, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4615-1245-5_17
    DOI: 10.1007/978-1-4615-1245-5_17
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