Rabi flopping without resonance - art. no. 033810

A three-level atom interacting with laser fields of different frequencies o ut of resonance is studied. The corresponding theory of dressed states is a pplied and extended beyond the leading order to obtain the higher-older cor rections. These higher-order corrections can be computed by a dual Dyson se ries. Rather than to apply perturbation theory, the equations for the proba bility amplitudes of the transformed Hamiltonian in the dual interaction pi cture are considered. This gives us the opportunity to study the resonance properties of the quantum dynamics of the three-level atom being driven out of resonance by the external laser fields. In this way, by different reson ance conditions due both to the detunings and the couplings, one gets Rabi flopping without resonance of the external fields and the atom levels, with also the Rabi frequency originating both from the detunings and the coupli ngs.