Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

Details Coherent control with shaped femtosecond laser pulses applied to ultracold molecules Coherent control with shaped femtosecond laser pulses applied to ultracold molecules

2005-09-07

arxiv.org/abs/physics/0509056v2

Phys. Rev. A 73, 023414 (2006)

Physics

Atomic Physics

Scientific paper

10.1103/PhysRevA.73.023414

We report on coherent control of excitation processes of translationally ultracold rubidium dimers in a magneto-optical trap by using shaped femtosecond laser pulses. Evolution strategies are applied in a feedback loop in order to optimize the photoexcitation of the Rb2 molecules, which subsequently undergo ionization or fragmentation. A superior performance of the resulting pulses compared to unshaped pulses of the same pulse energy is obtained by distributing the energy among specific spectral components. The demonstration of coherent control to ultracold ensembles opens a path to actively influence fundamental photo-induced processes in molecular quantum gases.

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