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20 April 2024

» arxiv » physics/0604140

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Theoretical model for ultracold molecule formation via adaptive feedback control
Ulrich Poschinger ; Wenzel Salzmann ; Roland Wester ; Matthias Weidemueller ; Christiane P. Koch ; Ronnie Kosloff ; PostScript ; PDF ; Other formats ;
Date:	18 Apr 2006
Subject:	Atomic Physics
Abstract:	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.
Source:	arXiv, physics/0604140
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