Decoherence and relaxation of a superconducting quantum bit during measurement

  title={Decoherence and relaxation of a superconducting quantum bit during measurement},
  author={L. Tian and S. Lloyd and T. Orlando},
  journal={Physical Review B},
  • L. Tian, S. Lloyd, T. Orlando
  • Published 2002
  • Physics
  • Physical Review B
  • During measurement, information is transferred from the measured quantum system to the detector via their coupling. The same coupling that extracts information from the quantum system transmits noise from the detector's environment to the system as well. In this paper, we derive the limit to the measurement efficiency of a superconducting persistent-current qubit measured by a dc superconducting quantum interference device (SQUID) and calculate the noise transmitted to the qubit from the… CONTINUE READING

    Figures from this paper.


    Publications referenced by this paper.
    Principles of magnetic resonance
    • 4,324
    Elements of Information Theory Wiley
    • 353
    Eur. Phys. J. B
      Low Temp. Phys. 65, 133 ͑1986͒. 10 A. Peres, Quantum Theory: Concepts and Methods ͑Kluwer Academic
      • 1993
      Nature ͑London͒ 406
        Phys. Rev. A
          Phys. Rev. Lett
            Quantum Fluctuations in Electrical Circuits
            • 224
            Quantum Optics ͑Springer
            • 1994