Abstract
An expression is derived for describing the transformation of the line shape in a two-level system with a fluctuating resonance frequency ω. In contrast to the existing approaches, the obtained expression is not based on any assumption regarding the distribution of frequencies ω. It is shown that, under conditions of a dichotomous random process when the resonance frequency ω randomly assumes one of two values, as well as under conditions of the Gauss-Markov and Lorentz-Markov random processes describing the frequency fluctuations, the derived expression reduces to well-known results. The transformation of the line shape of a two-level system described by the plateau-shaped Abragam curve is considered as an example.
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