Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances

Details Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances

2008-04-18

arxiv.org/abs/0804.3011v2

Phys. Rev. Lett. 101, 040401 (2008)

Physics

Atomic Physics

4 pages, 2 figs, 22+ refs; v2 improved abstract, refined discussion of exptl motivation, improved word choice in discussion of

Scientific paper

10.1103/PhysRevLett.101.040401

We model combined photoassociation and Feshbach resonances in a Bose-Einstein condensate. When the magnetic field is far-off resonance, cross coupling between the two target molecules--enabled by the shared dissociation continuum--leads to an anomalous dispersive shift in the position of laser resonance, as well as unprecedented elimination and enhancement of resonant photoassociation via quantum interference. For off-resonant lasers, a dispersive shift and quantum interference appear similarly in resonant three-body Feshbach losses, except that the Feshbach node is tunable with intensity.

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