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Physical Review A

QED derivation of the Stark shift and line broadening induced by blackbody radiation

Dmitry A. Solovyev, Leonti N Labzowsky, G. Plunien

Published Aug 20, 2015• 30 citations
Publisher

Abstract

A first-principles, QED derivation reveals a different type of line broadening of atomic levels induced by blackbody radiation, which is expected to help in the understanding of the evolution of the early universe when hydrogen atoms were first formed.
DOI
10.1103/physreva.92.022508

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Two different effects of the blackbody-radiation-induced atomic line broadening are compared. The first one (stimulated Raman scattering) has been discussed by many authors; the second one (quadratic level mixing) was discussed in our previous work. It is shown that the mixing effect gives the most significant contribution to the line broadening and it is indicated how to distinguish these two effects in laboratory experiments. The influence of the level mixing on the recombination history of primordial plasma is also discussed.