Theoretical model for ultracold molecule formation via adaptive feedback control
| Autor: | Matthias Weidemueller, Ulrich Poschinger, Christiane P. Koch, Ronnie Kosloff, Roland Wester, Wenzel Salzmann |
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| Rok vydání: | 2006 |
| Předmět: |
Physics
Atomic Physics (physics.atom-ph) FOS: Physical sciences Physics::Optics Condensed Matter Physics Laser Pulse shaping Atomic and Molecular Physics and Optics Physics - Atomic Physics law.invention Pulse (physics) Amplitude Molecule formation law Adaptive feedback control Femtosecond Physics::Atomic Physics Atomic physics Ground state |
| Zdroj: | Journal of Physics B: Atomic, Molecular and Optical Physics. 39:S1001-S1015 |
| ISSN: | 1361-6455 0953-4075 |
| DOI: | 10.1088/0953-4075/39/19/s14 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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