Quantum Chemistry Seminar
Production of ultracold molecules via photoassociation through a Feshbach resonance
The study of ultracold molecules (typically below 1 mK) is of particular interest as they offer a rich variety of applications such as high resolution spectroscopy or quantum information processing. However, forming such ultracold molecules is not an easy task. Laser cooling and trapping techniques developed successfully for atoms over the last few decades, can not be easily generalized to molecules because of the more complicated energy structure. Photoassociation, which occurs when two colliding atoms absorb a photon to form a molecule in a bound rovibrational level, has been widely used to produce ultracold dimers. However forming ultracold stable molecules in their ground vibrational levels still remains a challenge. We will present an investigation of photoassociation in the vicinity of a Feshbach resonance for the production of ultracold molecules in their lowest vibrational levels. The use of a magnetically induced Feshbach resonance enhances dramatically the probability density at short range allowing efficient transitions, even for deeply bound levels. We will illustrate this effect in both homonuclear and heteronuclear systems.
Future applications will be presented as well.
*) Lunch at 12:30 before the talk.
Friday, October 12, 2007
Gant Science Complex