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Photostabilization of the ultracold Rb2 molecule by optimal control

B Schäfer-Bung, R Mitrić and V Bonačić-Koutecký

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We present a theoretical study of the photostabilization of the ultracold Rb2 molecule by tailored laser fields. The simulations involve the ground and two excited electronic states, taking into account spin–orbit coupling, and are based on the full quantum mechanical optimal control theory. We demonstrate starting from a highly excited bound vibrational state that almost 100% population of the ground state v = 0 vibrational level can be achieved. The obtained optimal pulse has a long temporal and very broad spectral range. Our results reveal the mechanism of the photostabilization process and allow the proposal of new strategies for the formation of ultracold molecules taking into account the necessary constraints for possible experimental realization.


PACS

37.10.Mn Slowing and cooling of molecules

33.20.Tp Vibrational analysis

31.30.J- Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions

33.70.Ca Oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors

Subjects

Atomic and molecular physics

Dates

Issue 19 (14 October 2006)

Received 12 April 2006, in final form 1 August 2006

Published 25 September 2006



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