Numerical analysis of Dicke's model for one atom
J Roessler, Miguel Orszag, R Ramirez · Journal of Physics A Mathematical and General · 1982
Using the Green function technique, the authors calculate the transition probability amplitude for one atom interacting with a one-mode electromagnetic field, without assuming the rotating-wave approximation (RWA). The effects of the RWA are studied in the time and frequency domains. In the time domain, the periodicity of the typical RWA results is broken; in the frequency domain, the Bloch-Siegert shift is obtained.