In a recent experiment, a Feshbach scattering resonance was exploited to observe Ramsey fringes in a 85Rb Bose-Einstein condensate. The oscillation frequency corresponded to the binding energy of the molecular state. We show that the observations are remarkably consistent with predictions of a resonance field theory in which the fringes arise from oscillations between atoms and molecules.
@article{arxiv.cond-mat/0204504,
title = {Ramsey fringes in a Bose-Einstein condensate between atoms and molecules},
author = {S. J. J. M. F. Kokkelmans and M. J. Holland},
journal= {arXiv preprint arXiv:cond-mat/0204504},
year = {2009}
}