Decoherence and relaxation of a superconducting quantum bit during measurement

@inproceedings{Tian2002DecoherenceAR,
  title={Decoherence and relaxation of a superconducting quantum bit during measurement},
  author={Lin Tian and Seth Lloyd},
  year={2002}
}
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