Dark superposition states between ultra-cold atoms and molecules generated by photoassociation

Autler-Townes spectroscopy is performed to investigate the coherence properties between ultra-cold atoms and sodium-dimers generated by photoassociation. Ultra-cold molecules have recently generated new interest due to the accomplishment of Bose-Einstein-condensation (BEC) of molecules and offer a variety of new approaches for a better understanding of atomic and molecular physics, precision measurements and fundamental research.