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Change of absorption line shape and of dispersion of of a two-level system in a quasiresonant monochromatic radiation field

D. B. Aleksandrov, A. M. Bonch-Bruevich, V. A. Khodovoǐ, N. A. Chigir

Published Jul 1, 1973• 1 citation
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The purpose of this paper is to develop a theory of saturation effects of the two-level system in two rotating rf fields with different frequencies and arbitrary intensities. We analyze this problem with the density matrix equation of motion including the relaxation processes, and the solution is obtained in the form of continued fraction. We give numerical calculations of the positions and shapes of the single and multiple quantum resonances, caused by large intensity rf fields using this continued fraction solution. It is also shown that the irradiation of an atomic system with a saturating field quasiresonant to a given transition drastically changes the absorption line shape of a probe field.