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Cross-Molecular Coupling in Combined Photoassociation and Feshbach Resonances | | Matt Mackie
; Matthew Fenty
; Danielle Savage
; Jake Kesselman
; | | Date: |
18 Apr 2008 | | Abstract: | We examine combined photoassociation and Feshbach resonances in a
Bose-Einstein condensate, focusing on the case where only one field, magnetic
or laser, is off-resonant. For off-resonant magnetic fields, the position of
laser resonance is dispersively shifted with magnetic field, blue below the
Feshbach resonance, while atom losses to photoassociation cease at a specific
magnetic field and saturate at the limit for magnetoassociation alone. For
off-resonant lasers, a similar shift occurs in the position of magnetic-field
resonance, and a node occurs in Feshbach losses at a particular laser detuning;
however, in contrast to the photoassociation node, the position of the Feshbach
node depends on intensity. Cross coupling between the photoassociation and
Feshbach molecules, and associated quantum interference, is implicated as the
physical mechanism responsible for this behavior. Off-Feshbach-resonant results
agree reasonably with recent observations. | | Source: | arXiv, 0804.3011 | | Services: | Forum | Review | PDF | Favorites | |
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