`Stückelberg interferometry' with ultracold molecules

Mark, M.; Kraemer, T.; Waldburger, P.; Herbig, J.; Chin, C.; Naegerl, H. -C.; Grimm, R.

`Stückelberg interferometry' with ultracold molecules

Authors

Description

We report on the realization of a time-domain `Stückelberg interferometer', which is based on the internal state structure of ultracold Feshbach molecules. Two subsequent passages through a weak avoided crossing between two different orbital angular momentum states in combination with a variable hold time lead to high-contrast population oscillations. This allows for a precise determination of the energy difference between the two molecular states. We demonstrate a high degree of control over the interferometer dynamics. The interferometric scheme provides new possibilities for precision measurements with ultracold molecules.
4 pages, 5 figures