Ramsey fringes in a Bose-Einstein condensate between atoms and molecules

Abstract

In a recent experiment, a Feshbach scattering resonance was exploited to observe Ramsey fringes in a ${}^{85}$Rb 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.

5 pages, 5 figures

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