TY - JOUR
T1 - Theoretical model for ultracold molecule formation via adaptive feedback control
AU - Poschinger, Ulrich
AU - Salzmann, Wenzel
AU - Wester, Roland
AU - Weidemüller, Matthias
AU - Koch, Christiane P.
AU - Kosloff, Ronnie
PY - 2006/10/14
Y1 - 2006/10/14
N2 - We theoretically investigate pump-dump photoassociation of ultracold molecules with amplitude- and phase-modulated femtosecond laser pulses. For this purpose, a perturbative model for 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 85Rb 2 molecules in a magneto-optical trap. We find that optimized pulse shapes may maximize the formation of ground state molecules in a specific vibrational state at a pump-dump delay time for which unshaped pulses lead to a minimum of the formation rate. Compared to the maximum formation rate obtained for unshaped pulses at the optimum pump-dump delay, the optimized pulses lead to a significant improvement of about 40% for the target level population. Since our model yields the spectral amplitudes and phases of the optimized pulses, the results are directly applicable in pulse shaping experiments.
AB - We theoretically investigate pump-dump photoassociation of ultracold molecules with amplitude- and phase-modulated femtosecond laser pulses. For this purpose, a perturbative model for 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 85Rb 2 molecules in a magneto-optical trap. We find that optimized pulse shapes may maximize the formation of ground state molecules in a specific vibrational state at a pump-dump delay time for which unshaped pulses lead to a minimum of the formation rate. Compared to the maximum formation rate obtained for unshaped pulses at the optimum pump-dump delay, the optimized pulses lead to a significant improvement of about 40% for the target level population. Since our model yields the spectral amplitudes and phases of the optimized pulses, the results are directly applicable in pulse shaping experiments.
UR - http://www.scopus.com/inward/record.url?scp=33749174410&partnerID=8YFLogxK
U2 - 10.1088/0953-4075/39/19/S14
DO - 10.1088/0953-4075/39/19/S14
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AN - SCOPUS:33749174410
SN - 0953-4075
VL - 39
SP - S1001-S1015
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
IS - 19
M1 - S14
ER -