Statistical sensitivity of phase measurements via laser-induced fluorescence with optical cycling detection

  title={Statistical sensitivity of phase measurements via laser-induced fluorescence with optical cycling detection},
  author={Zack D. Lasner and David DeMille},
  journal={Physical Review A},
In atomic and molecular phase measurements using laser-induced fluorescence detection, optical cycling can enhance the effective photon detection efficiency and hence improve sensitivity. We show that detecting many photons per atom or molecule, while necessary, is not a sufficient condition to approach the quantum projection limit for detection of the phase in a two-level system. In particular, detecting the maximum number of photons from an imperfectly closed optical cycle reduces the signal… 

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