Fisher information as a generalized measure of coherence in classical and quantum optics.

  title={Fisher information as a generalized measure of coherence in classical and quantum optics.},
  author={Alfredo Luis},
  journal={Optics express},
  volume={20 22},
  • A. Luis
  • Published 22 October 2012
  • Physics
  • Optics express
We show that metrological resolution in the detection of small phase shifts provides a suitable generalization of the degrees of coherence and polarization. Resolution is estimated via Fisher information. Besides the standard two-beam Gaussian case, this approach provides also good results for multiple field components and nonGaussian statistics. This works equally well in quantum and classical optics. 

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