光偶极阱中的异质结分子
Heteronuclear molecules in an optical dipole trap
摘要：
我们报告的创建和表征的异质KRb Feshbach分子的光偶极阱。从K-40和Rb-87原子的超冷气体混合物开始，我们通过rf缔合在300 nK下产生多达25，000个分子。通过优化关联过程，我们实现了25%的转换效率。我们测量的RF协会过程的温度依赖性，并找到良好的协议与现象学模型，以前已被应用到Feshbach分子创建缓慢的磁场扫描。我们还提出了一个测量的结合能的异质结分子在附近的费什巴赫共振，并提供证据Feshbach分子深绑定为26 MHz。
英文摘要：
We report on the creation and characterization of heteronuclear KRb Feshbach molecules in an optical dipole trap. Starting from an ultracold gas mixture of K-40 and Rb-87 atoms, we create as many as 25,000 molecules at 300 nK by rf association. Optimizing the association process, we achieve a conversion efficiency of 25%. We measure the temperature dependence of the rf association process and find good agreement with a phenomenological model that has previously been applied to Feshbach molecule creation by slow magnetic-field sweeps. We also present a measurement of the binding energy of the heteronuclear molecules in the vicinity of the Feshbach resonance and provide evidence for Feshbach molecules as deeply bound as 26 MHz.
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