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Quantum Information Processing

, Volume 5, Issue 6, pp 563–575 | Cite as

Efficient Read-out of Flux Qubits at Flux Degeneracy

  • Andreas Käck
  • Göran Wendin
  • Frank K. Wilhelm
Article
  • 55 Downloads

We discuss a novel method to read out a superconducting flux qubit at the flux degeneracy point, using a charge measurement through a single charge transistor SCT. The interaction is based on the Aharonov-Casher geometric phase. The read-out cycle indicates one of the states by a fluorescence-like cycle. We discuss how to efficiently implement this scheme with the SCT in the RF mode.

Keywords

Quantum information flux qubits 

Pacs

03.67.Lx 74.40.+k 85.25.Cp 

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References

  1. 1.
    G. Wendin and V. S. Shumeiko, in Michael Rieth and Wolfram Schommers (eds) Prepared for Handbook of Theoretical and Computational Nanotechnology, vol. 1 (American Scientific Publishers, 2005), pp 1–86; cond-mat/0508729.Google Scholar
  2. 2.
    Orlando T.P. et al. (1999). Phys. Rev. B 60:15398CrossRefADSGoogle Scholar
  3. 3.
    Chiorescu I., Nakamura Y., Harmans C., Mooij J. (2003). Science 299:1869CrossRefADSGoogle Scholar
  4. 4.
    Chiorescu I. et al. (2004). Nature 431, 159CrossRefADSGoogle Scholar
  5. 5.
    Burkard G. et al. (2005). Phys. Rev. B 71:134504CrossRefADSGoogle Scholar
  6. 6.
    Lupascu A., Harmans C.J.P.M., Mooij J.E. (2005). Phys. Rev. B 71:184506CrossRefADSGoogle Scholar
  7. 7.
    Makhlin Y., Shnirman A. (2004). Phys. Rev. Lett. 92:178301CrossRefADSGoogle Scholar
  8. 8.
    Majer J., Butcher J., Mooij J. (2002). Appl. Phys. Lett. 80:3638CrossRefADSGoogle Scholar
  9. 9.
    Vion D. et al. (2002). Science 296, 886CrossRefADSGoogle Scholar
  10. 10.
    Ithier G. et al. (2005). Phys. Rev. B 72:134519CrossRefADSGoogle Scholar
  11. 11.
    Amin M. (2005). Phys. Rev. B 71:024504CrossRefADSGoogle Scholar
  12. 12.
    Elion W., Wachters J., Sohn L., Mooij J. (1993). Phys. Rev. Lett. 71:2311CrossRefADSGoogle Scholar
  13. 13.
    Friedman J., Averin D. (2002). Phys. Rev. Lett. 88:050403CrossRefADSGoogle Scholar
  14. 14.
    Bloch F. (1957). Phys. Rev. 105:1206MATHMathSciNetCrossRefADSGoogle Scholar
  15. 15.
    Redfield A. (1957). IBM J. Res. Develop. 1, 19CrossRefGoogle Scholar
  16. 16.
    G.-L. Ingold and Y. V. Nazarov, in H. Grabert and M. Devoret (eds) Single Charge Tunneling (Plenum, New York, 1992), pp. 21–107.Google Scholar
  17. 17.
    Ingold G.-L., Wyrowski P., Grabert H. (1991). Zeit. Phys. B 85, 443CrossRefADSGoogle Scholar
  18. 18.
    Wilhelm F.K., Schön G., Zimányi G. T. (2001). Phys. Rev. Lett. 87:136802CrossRefADSGoogle Scholar
  19. 19.
    Petterson J. et al. (1996). Phys. Rev. B 53:13272CrossRefADSGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  • Andreas Käck
    • 1
  • Göran Wendin
    • 1
  • Frank K. Wilhelm
    • 2
    • 3
  1. 1.Dept. of Microtechnology and Nanoscience (MC2)Chalmers University of TechnologyGothenburgSweden
  2. 2.Sektion Physik and CeNSLudwig-Maximilians-UniversitätMünchenGermany
  3. 3.Department of Physics and Astronomy and IQCUniversity of WaterlooWaterlooCanada

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