Abstract
For bound quantum systems in presence of strong long wavelength electromagnetic fields the time evolution operator is calculated by application of the Magnus expansion in the interaction picture. We find that the first two orders of the Magnus expansion of the interaction picture time evolution operator contain both the momentum-translation transform of H.R. Reiss and terms which give rise to a non-static Stark-effect.
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References
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Campos, D., Krüger, H. Calculation of transitions in intense laserfields with the Magnus expansion. Z Physik A 274, 23–25 (1975). https://doi.org/10.1007/BF01421031
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DOI: https://doi.org/10.1007/BF01421031