Université Paul Sabatier - Bat. 3R1b4 - 118 route de Narbonne 31062 Toulouse Cedex 09, France

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Phase control of nonadiabatic optical transitions

We theoretically study the interaction of two time delayed, phase-locked, and nonresonant pulses with a two-level system in the strong field regime. The population transfer is shown to be extremely sensitive to the phase shift phi between the pulses, with efficient population transfer taking place only for phi close to pi. This effect is explained in terms of nonadiabatic jump and rapid adiabatic passage phenomena.

View online : Phys. Rev. A 79, 025401 (2009)