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Superconducting Electrometer for Measuring the Single Cooper Pair Box

In: Macroscopic Quantum Coherence and Quantum Computing

Author

Listed:
  • A. Cottet

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • A. Steinbach

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • P. Joyez

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • D. Vion

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • H. Pothier

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • D. Esteve

    (Service de Physique de l’Etat Condensé, CEA-Saclay)

  • M. E. Huber

    (University of Colorado at Denver, Department of Physics)

Abstract

We discuss for the single Cooper pair box the contributions to relaxation and to decoherenee of the electromagnetic environment, of the offset charg enoise, and of a measuring Single Electron Transistor. We show that a single Cooper pair transistor can also be used for that purpose. Experimentally, we have operated such a device by measuring the variations of its critical supercurrent with the gate voltage using a SQUID series array amplifier. We describe the characteristics of this new electrometer and compare different schemes for measuring the critical current.

Suggested Citation

  • A. Cottet & A. Steinbach & P. Joyez & D. Vion & H. Pothier & D. Esteve & M. E. Huber, 2001. "Superconducting Electrometer for Measuring the Single Cooper Pair Box," Springer Books, in: Dmitri V. Averin & Berardo Ruggiero & Paolo Silvestrini (ed.), Macroscopic Quantum Coherence and Quantum Computing, pages 111-125, Springer.
    • Handle: RePEc:spr:sprchp:978-1-4615-1245-5_12
    DOI: 10.1007/978-1-4615-1245-5_12
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