Investigation of the electromagnetically induced transparency in era of cosmological hydrogen recombination

Abstract

Investigation of the cosmic microwave background formation processes is one of the most actual problem at present time. In this paper we analyze the response of the hydrogen atom to the external photon fields. Field characteristics are defined via conditions corresponding to the recombination era of universe. Approximation of three-level atom is used to describe the "atom - fields" interaction. It is found that the phenomena of the electromagnetically induced transparancy takes place in this case. Consideration of EIT phenomena makes it necessary to update astrophysical description of the processes of the cosmic microwave background formation and, in particular, Sobolev escape probability. Additional terms to the optical depth in definition of Sobolev escape probability on the level about 1% are found.

16 pages, 4 figures, 1 Table

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Cited by in corpus (2)

• EIT phenomenon for the three-level hydrogen atoms and its application to the era of the cosmological recombination
• Analysis of the Absorption Line Profile at 21 cm for the Hydrogen Atom in Interstellar Medium