Theoretical model for ultracold molecule formation via adaptive feedback control
摘要
We investigate pump-dump photoassociation of ultracold molecules with amplitude- and phase-modulated femtosecond laser pulses. For this purpose a perturbative model for the light-matter interaction is developed and combined with a genetic algorithm for adaptive feedback control of the laser pulse shapes. The model is applied to the formation of 85Rb2 molecules in a magneto-optical trap. We find for optimized pulse shapes an improvement for the formation of ground state molecules by more than a factor of 10 compared to unshaped pulses at the same pump-dump delay time, and by 40% compared to unshaped pulses at the respective optimal pump-dump delay time. Since our model yields directly the spectral amplitudes and phases of the optimized pulses, the results are directly applicable in pulse shaping experiments.
引用
@article{arxiv.physics/0604140,
title = {Theoretical model for ultracold molecule formation via adaptive feedback control},
author = {Ulrich Poschinger and Wenzel Salzmann and Roland Wester and Matthias Weidemueller and Christiane P. Koch and Ronnie Kosloff},
journal= {arXiv preprint arXiv:physics/0604140},
year = {2009}
}