Title | Dispersive optical detection of magnetic Feshbach resonances in ultracold gases |
Publication Type | Journal Article |
Year of Publication | 2017 |
Authors | Sawyer, BJ, Horvath, MSJ, Tiesinga, E, Deb, AB, Kjærgaard, N |
Journal | Physical Review A |
Volume | 96 |
Issue | 2 |
Pages | 022705 |
Date Published | 2017/08/18 |
Abstract | Magnetically tunable Feshbach resonances in ultracold atomic systems are chiefly identified and characterized through time consuming atom loss spectroscopy. We describe an off-resonant dispersive optical probing technique to rapidly locate Feshbach resonances and demonstrate the method by locating four resonances of 87Rb, between the |F=1,mF=1〉 and |F=2,mF=0〉 states. Despite the loss features being ≲100 mG wide, we require only 21 experimental runs to explore a magnetic field range >18 G. The resonances consist of two known s-wave features in the vicinity of 9 G and 18 G and two previously unobserved p-wave features near 5 G and 10 G. We further utilize the dispersive approach to directly characterize the two-body loss dynamics for each Feshbach resonance. |
URL | https://arxiv.org/abs/1702.02216 |
DOI | 10.1103/PhysRevA.96.022705 |