The absorption of light by hydrogenic plasmas. I

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Abstract
The dispersion of light by a high-temperature hydrogenic plasma is considered from a fully quantum mechanical many-body point of view. Unlike the usual theories, Doppler effects, Stark and pressure effects, photo- and free-free processes can all be treated within one framework of mathematical and physical assumptions. The method proceeds via the double-time statistical photon Green's function, the transverse dielectric function and the spectral intensity function. The theory includes nonlinear effects like coupling between transverse and longitudinal excitations, resonance transfer effects, spatial dispersion, etc, via the dielectric functions appearing naturally in the theory. The generality of the theoretical approach and its potential computational convenience are points in its favour.