Control of population inversion and coherence generation in Rb and Cs atoms

摘要

Control of population inversion and coherence generation between the ground and excited states in Hydrogen-like alkali atoms is presented in this work using multiphoton π-pulse scheme with pulse durations between 100 fs to 10 ps. Density matrix (DM) equations of 4-level Rb and Cs systems are numerically solved beyond the rotating wave approximation (RWA) taking detuning and spectral chirp into account. An extension of the study is done to nP_(3/2) (n = 12) and nF_(5/2) (n = 8) of Cs atoms demonstrating the applicability of the current scheme in selective Rydberg excitation and potential extendibility to numerous configurations.