Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances

Abstract

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.

4 pages, 2 figs, 22+ refs; v2 improved abstract, refined discussion of exptl motivation, improved word choice in discussion of future work; to appear in Phys. Rev. Lett

References in corpus (3)

• Tuning the scattering length with an optically induced Feshbach resonance
• Spontaneous dissociation of long-range Feshbach molecules
• Tree-body loss of of trapped ultracold ${}^{87}$Rb atoms due to a Feshbach resonance

Cited by in corpus (8)

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• Photoassociation of a Bose-Einstein Condensate near a Feshbach Resonance
• Combination of a magnetic Feshbach resonance and an optical bound-to-bound transition
• Trimer superfluid and supersolid on two-dimensional optical lattices
• Trimer superfluid induced by photoassocation on the state-dependent optical lattice
• Quantum Effects at Low Energy Atom-Molecule Interface
• Coherent bimolecular reactions with quantum-degenerate matter waves
• Creating a Quantum Degenerate Gas of Stable Molecules via Weak Photoassociation