Cross-molecular coupling in combined photoassociation and Feshbach resonances.
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.
Mackie
Matt
M
Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.
Fenty
Matthew
M
Savage
Danielle
D
Kesselman
Jake
J