Abstract
A powerful approach to generate multilevel superpositionstate in ∧-type manifold of levels is proposed. In the analysis, weintroduce a group of rotations to transform the coupled system to a simplerform, which involves one coupled and several decoupled, dark states in theground state manifold. Then an arbitrary superposition state of initial andfinal states can be created. In particular, when the Rabi frequencies of theStokes pulses have equal magnitudes, a superposition state (equal populationof the (n−2) superposition states) will be generated. A numerical simulationof coherence generation is given. It is shown that a small transientpopulation in metastable state decreases as the intensity of Stokes pulsesincreases. Experimental implementation in Neon atom is given.
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