  We report and propose a simple scheme to achieve efficient and fast coherent
population transfer (CPT) by utilizing either a nonlinearly chirped Gaussian
shaped few-cycle laser pulse or an unchirped sinc-shaped few-cycle laser pulse.
The proposed scheme is shown to be fairly robust against the variation of the
laser parameters such as temporal pulse width, chirp rates, carrier envelope
phases and Rabi frequencies. We find that compared to the so-called stimulated
Raman adiabatic passage (STIRAP) technique, our scheme for complete population
transfer with few-cycle Gaussian shaped laser pulses requires less pulse area.
