Measurement of a microwave field amplitude beyond the standard quantum limit

@article{Penasa2016MeasurementOA,
  title={Measurement of a microwave field amplitude beyond the standard quantum limit},
  author={Mariane Penasa and Stefan Gerlich and Th{\'e}o Rybarczyk and Valentin M'etillon and Michel Brune and J. M. Raimond and Serge Haroche and Luiz Davidovich and Igor Dotsenko},
  journal={Physical Review A},
  year={2016},
  volume={94},
  pages={022313}
}
  • Mariane Penasa, Stefan Gerlich, +6 authors Igor Dotsenko
  • Published 2016
  • Physics
  • Physical Review A
  • We report a quantum measurement beyond the standard quantum limit (SQL) for the amplitude of a small displacement acting on a cavity field. This measurement uses as a resource an entangled mesoscopic state, prepared by the resonant interaction of a circular Rydberg atom with a field stored in a superconducting cavity. We analyze the measurement process in terms of Fisher information and prove that it is, in principle, optimal. The experimental precision achieved, 2.4 dB below the SQL, is well… CONTINUE READING

    Figures and Tables from this paper.

    Citations

    Publications citing this paper.
    SHOWING 1-10 OF 12 CITATIONS

    References

    Publications referenced by this paper.
    SHOWING 1-10 OF 24 REFERENCES