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Control of the Lamb shift by a driving field
(American Physical Society, 2010)
A unitary transformation approach is used to study the energy level shift of the atom coupled to both a vacuum electromagnetic field and a driving laser. The Lamb shift of the energy levels is shown to depend on the Rabi ...
Effect of the counterrotating-wave terms on the spontaneous emission from a multilevel atom
(American Physical Society, 2009)
The spontaneous decay of a multilevel atom interacting with the electromagnetic field in free space is investigated with a unitary transformation method, which is introduced in order to include all rotating and counter-rotating ...