Abstract
We propose an ultrafast femtosecond time scale trichromatic -pulse illumination scheme for coherent excitation and manipulation of low-lying Rydberg states in rubidium. Selective population of levels with principal quantum numbers using 75-fs laser pulses is achieved. The density-matrix equations of a four-level ladder system beyond the rotating-wave approximation have to be solved to clarify the balance between the principal quantum numbers, the duration of the laser pulses, and the associated ac-Stark effects for the fastest optimal excitation. The mechanism is robust for femtosecond control using different level configurations for applications in ultrafast quantum information processing and spectroscopy.
- Received 9 May 2017
DOI:https://doi.org/10.1103/PhysRevA.96.053843
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