US Army Research Laboratory, Adelphi, MD 20783
Ability of efficient control of population transfer in quantum systems has an important place in a variety of research areas including laser atomic and molecular spectroscopy, photochemistry, biology and quantum information processing. Presence of the spontaneous decay of the excited states can substantially reduce success of the controllability and requires special attention in development of the control schemes which have immunity to the spontaneous decay and decoherence. A few robust population transfer schemes, such as stimulated Raman adiabatic passage (STIRAP) and chirped-pulse adiabatic passage, has been developed and applied in quantum control experiments. In this work we consider population transfer in three-level system by applying frequency comb. Using two frequency combs arranged in Raman configuration we design a scheme which allows a substantial reduction of the intermediate state population while keeping almost perfect efficiency of the population transfer to the target state. Comparison with the above mentioned methods is also discussed.
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