Abstract
The authors solve Maxwell's equations for a medium with a random dielectric constant by an iterative method that takes into account all two-photon processes by summing all the maximal crossed and ladder diagrams. Their analytic solution for the back-scattering intensity I leads to an inverse linear dependence on wavenumber (I varies as 1/Q), in agreement with recent experiments. The shape of the peak preserves the main features that are found by the approach that replaces Maxwell's equations by a diffusion equation but takes into account interference from time-reversed photon trajectories.
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