DPG Phi
Verhandlungen
Verhandlungen
DPG

Osnabrück 2002 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe

Q: Quantenoptik

Q 511: Fallen und Kühlung II

Q 511.7: Vortrag

Freitag, 8. März 2002, 15:30–15:45, HS 22/B01

Trapping alkali dimers in a CO2 laser trap — •Marcel Mudrich1, Stephan Kraft1, Jörg Lange1, Daniel Comparat2, and Matthias Weidemüller11Max-Planck-Institut für Kernphysik, Heidelberg — 2Laboratoire Aimé Cotton, Orsay, France

Optical storage of cold molecules is an intriguing extension of trapping neutral atoms in optical dipole traps. Manipulation of the internal and external degrees of freedom with external fields as well as interaction studies are possible on a long time scale. Until now, molecules in the µK regime can only be created in MOTs trough photoassociation [1], and optical trapping of the ultracold molecules has been achieved only once using an optical dipole trap formed by the focus of a CO2 laser [2].

We present estimates of transition rates between bound and unbound states due to the interaction of ultracold alkali dimers with the trapping light of a CO2 laser. Vibrational transitions in heteronuclear dimers are studied in the protoype system LiCs. In the homonuclear case, transition strengths from the ground state to the continuum induced by 2nd order spin-orbit coupling are compared to magnetic dipole and electric quadrupole transitions in Cs2 and Rb2. These processes leading to dissociation are opposed to direct photoassociation of cold molecules in the ground state by the trapping light.

[1] A. Fioretti et al., Phys. Rev. Lett. 80, 4402 (1998)

[2] T. Takekoshi et al., Phys. Rev. Lett. 81, 5105 (1998)

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2002 > Osnabrück