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Quantum Measurement of the State of a Coherently Coupled Dot Device

  • He-Bi Sun
  • Howard M. Wiseman
  • Dian W. Utami
  • Gerard J. Milburn
Conference paper
  • 520 Downloads

Abstract

One limit on the performance of a quantum computer is unambiguous readout of data encoded in the qubit states. We analyze a method to measure the states of a coherently coupled dot device (qubit) using a single electron transistor. We derive a master equation to describe the unconditional evolution of the qubit when the measured records are averaged over, and a conditional stochastic master equation describes the conditional evolution of the qubit. The results from both descriptions are consistent.

Keywords

Master Equation Quantum Measurement Noise Spectrum Qubit State Noise Power Spectrum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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    G. Schön, A. Shnirman, and Y. Makhlin, cond-mat/9811029Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • He-Bi Sun
    • 1
  • Howard M. Wiseman
    • 1
    • 2
  • Dian W. Utami
    • 1
  • Gerard J. Milburn
    • 1
  1. 1.University of QueenslandBrisbaneAustralia
  2. 2.Griffith UniversityNathanAustralia

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