Dispersive optical detection of magnetic Feshbach resonances in ultracold gases.
Dispersive optical detection of magnetic Feshbach resonances in ultracold gases.
复制标题
超冷气体中磁费什巴赫共振的色散光学检测。
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
N. Kjærgaard
中科院分区：
文献类型：
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作者：
Bianca J. Sawyer;Milena S. J. Horvath;E. Tiesinga;A. Deb;N. Kjærgaard
超冷原子体系中的磁可调谐费什巴赫共振主要是通过耗时的原子损耗光谱来识别和表征的。我们描述了一种非共振色散光学探测技术来快速定位费什巴赫共振，并通过定位|F = 1,mF = 1 >和|F = 2,mF = 0 >之间的四个87Rb共振来证明该方法。尽管损耗特征宽度为0.1 G，但我们只需要21次实验就可以探索磁场范围> - 18g，其中1G = 10-4 t。共振由两个已知的9g和18g附近的s波特征和两个以前未报道的5G和10g附近的p波特征组成。我们进一步利用色散方法直接表征每个费什巴赫共振的两体损耗动力学。
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 ≲0.1 G wide, we require only 21 experimental runs to explore a magnetic field range >18 G, where 1G = 10-4 T. The resonances consist of two known s-wave features in the vicinity of 9 G and 18 G and two previously unreported p-wave features near 5G and 10 G. We further utilize the dispersive approach to directly characterize the two-body loss dynamics for each Feshbach resonance.