Optical Production of Stable Ultracold 88Sr2 Molecules
Abstract
We have produced large samples of ultracold 88Sr2 molecules in the electronic ground state in an optical lattice. The molecules are bound by 0.05 cm-1 and are stable for several milliseconds. The fast, all-optical method of molecule creation via intercombination line photoassociation relies on a near-unity Franck-Condon factor. The detection uses a weakly bound vibrational level corresponding to a very large dimer. This is the first of two steps needed to create Sr2 in the absolute ground quantum state. Lattice-trapped Sr2 is of interest to frequency metrology and ultracold chemistry.
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