Hannover 2010 – scientific programme

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MO: Fachverband Molekülphysik

MO 19: Ultracold Molecules (with Q)

MO 19.3: Talk

Thursday, March 11, 2010, 11:15–11:30, E 001

Effect of molecular structure on the stabilization of ultracold molecules — •Mamadou Ndong, Fabian Borschel, and Christiane P. Koch — Institut für Theoretische Physik, Freie Universität Berlin, Germany

Ultracold molecules are created from ultracold atoms using Feshbach resonances or photoassociation. As a result, the molecules are vibrationally highly excited. They can be stabilized by transferring them to their vibrational ground state via STIRAP or with optimally shaped pulses.

Using optimal control theory, we investigate the effect of the long-range behavior of the excited state potential, spin-orbit coupling and singlet-triplet mixing on the energy and the spectral range of the optimal pulse that performs the stabilization. We present a detailed study of the role of the long-range behavior of the excited state potential comparing Na₂ and KRb. Moreover, the spin-orbit coupling interaction for KRb is taken into account to study effects of resonant coupling and singlet-triplet mixing.