  The suppression of the bremsstrahlung cross section due to multiple
scattering of the emitting electrons is an important effect in dense media
(Landau-Pomeranchuk-Migdal effect). Here, we study the emission from a dense,
fully-ionized and non-relativistic hydrogen plasma. Using the dielectric
approach, we relate optical properties such as emission and absorption to
equilibrium force-force correlation functions, which allow for a systematic
perturbative treatment with the help of thermodynamic Green functions. By
considering self-energy and vertex corrections, medium modifications such as
multiple scattering of the emitting electrons are taken into account. Results
are presented for the absorption coefficient as a function of the frequency at
various densities. It is shown that the modification of the inverse
bremsstrahlung due to medium effects becomes more significant in the low
frequency and high density region.
