Radiative Corrections to the Final State of a Single Two-Level Atom
The radiative level shifts have often been treated in the literature (see, e.g., Refs. 1–3 and the references quoted therein). It was shown that there are atomic level shifts caused by the interaction with the radiation field. These level shifts, or in other words the corrections to the unperturbed energy eigenvalues of the atomic states, could be calculated by using stationary perturbation theory.
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