Journal
SCIENCE
Volume 321, Issue 5892, Pages 1062-1066Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1159909
Keywords
-
Categories
Funding
- Austrian Ministry of Science and Research (Bundesministerium fur Wissenschaft und Forschung
- Austrian Science Fund (Fonds zur Forderung der wissenschaftlichen Forschung)
- START prize grant
- European Science Foundation
- EuroQUAM collective research project QuDipMol
Ask authors/readers for more resources
Molecular cooling techniques face the hurdle of dissipating translational as well as internal energy in the presence of a rich electronic, vibrational, and rotational energy spectrum. In our experiment, we create a translationally ultracold, dense quantum gas of molecules bound by more than 1000 wave numbers in the electronic ground state. Specifically, we stimulate with 80% efficiency, a two- photon transfer of molecules associated on a Feshbach resonance from a Bose- Einstein condensate of cesium atoms. In the process, the initial loose, long- range electrostatic bond of the Feshbach molecule is coherently transformed into a tight chemical bond. We demonstrate coherence of the transfer in a Ramsey- type experiment and show that the molecular sample is not heated during the transfer. Our results show that the preparation of a quantum gas of molecules in specific rovibrational states is possible and that the creation of a Bose- Einstein condensate of molecules in their rovibronic ground state is within reach.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available