Coherent population transfer in a three-level Lambda system driven by unmatched Gaussian pulses

Abstract

The population transfer in a three-level A system driven by unmatched Gaussian pulses is investigated. A set of time-dependent density matrix equations is solved numerically using the rotating wave approximation, and the solution shows that the population of the atomic level depends strongly on the pulse widths of the applied probe and coupling pulses. If the parameters are chosen appropriately, population can be transferred almost completely to the target state, which interacts with the pulse with the smaller pulse width.