Theoretical model for ultracold molecule formation via adaptive feedback control

Details Theoretical model for ultracold molecule formation via adaptive feedback control Theoretical model for ultracold molecule formation via adaptive feedback control

2006-04-18

arxiv.org/abs/physics/0604140v2

J. Phys. B 39, 1001 (2006)

Physics

Atomic Physics

Scientific paper

10.1088/0953-4075/39/19/S14

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.

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