Universal structure of field correlations within a fluctuating medium.

  title={Universal structure of field correlations within a fluctuating medium.},
  author={Sergey A. Ponomarenko and Emil Wolf},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={65 1 Pt 2},
We study the structure of the second-order correlation function of scalar wave fields, which are generated by statistically stationary sources, fluctuating within a homogeneous dissipative medium. We derive a closed-form analytical expression for the spectral degree of coherence of the wave field. If the dissipation in the medium is sufficiently small, and the source fluctuations are statistically isotropic, the degree of spatial coherence of the field produced by any such source is shown to be… CONTINUE READING