Feshbach molecule formation through an oscillating magnetic field: subharmonic resonances
Feshbach molecule formation through an oscillating magnetic field: subharmonic resonances
复制标题
通过振荡磁场形成 Feshbach 分子：次谐波共振
DOI：
10.1088/0953-4075/48/6/065002
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
J. Plata
中科院分区：
文献类型：
--
作者：
S. Brouard;J. Plata
研究了磁场正弦调制下超冷原子通过磁Feshbach共振向分子的转化。分析了该方法在玻色原子气体中的不同实际实现。我们的模型通过有效地减少完整的微观动力学结合了多体效应。此外，我们模拟了相应的实验条件下制备的系统作为热气体和作为冷凝物。一些实验结果进行了澄清。阐明了所观察到的生产效率对磁调制的频率、振幅和应用时间的依赖性的起源。我们的结果还揭示了原子密度在动力学中的作用，特别是在观察到的原子-分子转换过程的饱和中的作用。
The conversion of ultracold atoms to molecules via a magnetic Feshbach resonance with a sinusoidal modulation of the field is studied. Different practical realizations of this method in Bose atomic gases are analyzed. Our model incorporates many-body effects through an effective reduction of the complete microscopic dynamics. Moreover, we simulate the experimental conditions corresponding to the preparation of the system as a thermal gas and as a condensate. Some of the experimental findings are clarified. The origin of the observed dependence of the production efficiency on the frequency, amplitude, and application time of the magnetic modulation is elucidated. Our results uncover also the role of the atomic density in the dynamics, specifically, in the observed saturation of the atom–molecule conversion process.