Abstract
We investigate a method for complete population inversion in three level systems through pi-pulse bichromatic two-photon coherent excitation and study the dependence on the chirp of the laser pulses. We observe that the population inversion does not monotonously decrease with increasing the time-bandwidth product, and that the excitation depends on the sign of the chirp of the individual pulses. Our results evidence a strategy for coherent population transfer which is energetically superior to adiabatic methods and opens the door for real-world applications, since it alleviates the need for challenging generation of transform-limited pulses at arbitrary wavelengths.
Highlights
Steering quantum processes in atoms and molecules through the manipulation of the properties of optical fields is the goal of coherent quantum control [1,2,3,4,5,6]
We investigate a method for complete population inversion in three level systems through π-pulse bichromatic two-photon coherent excitation and study the dependence on the chirp of the laser pulses
In the present paper we investigate the influence of pulse chirp, as it occurs in most real-world situations, on complete population inversion on the example of a three-level system
Summary
Steering quantum processes in atoms and molecules through the manipulation of the properties of optical fields is the goal of coherent quantum control [1,2,3,4,5,6]. Abstract: We investigate a method for complete population inversion in three level systems through π-pulse bichromatic two-photon coherent excitation and study the dependence on the chirp of the laser pulses. We observe that the population inversion does not monotonously decrease with increasing the time-bandwidth product, and that the excitation depends on the sign of the chirp of the individual pulses.
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