Phase-sensitive dynamics of bichromatically driven two-level atoms
The study demonstrates the atomic dynamics in the presence of transient bichromatic excitation. The phase-dependent dynamics and the polarization of population with in the doublets of dressed states are reported that describe the atom coupled solely to the bichromatic field pump component. The focus of the study is on the transient response of two-level atoms to excitation by a step function bichromatic excitation field. The role of the initial relative phase of the bichromatic field components in determining the atomic response is demonstrated. A complete atom pump-field dressed-state polarization from certain initial relative phases was also shown.