title: 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.
authors.affiliation: Department of Physics, Temple University, Philadelphia, Pennsylvania 19122, USA.
authors.forename: Matt
authors.initials: M
authors.lastname: Mackie
authors.forename: Matthew
authors.initials: M
authors.lastname: Fenty
authors.forename: Danielle
authors.initials: D
authors.lastname: Savage
authors.forename: Jake
authors.initials: J
authors.lastname: Kesselman