A Floquet formalism for the interaction of magnetically trapped atoms with rf fields
A Floquet formalism for the interaction of magnetically trapped atoms with rf fields
复制标题
磁捕获原子与射频场相互作用的 Floquet 形式
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Mishra
中科院分区：
文献类型：
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作者：
A. Chakraborty;S. Mishra
利用多模Floquet理论研究了多色射频场与四极磁阱中冷原子的相互作用。MMFT方法的有效性首先通过比较其结果与以前使用的单频和双频RF场的情况下的形式主义。研究了无限矩阵截断的影响，并得到了适合数值实现的截断阶数。对复合原子-光场系统的计算结果显示了一些精细的特征，如本征能量的晶格周期性变化和原子态间大的双光子跃迁几率。还研究了陷阱位置、深度和宽度等陷阱参数与场强和模式分离等射频场参数的关系。这项工作预测产生的晶格型原子捕获的几何形状，可以通过改变的多色射频场的射频场参数进行控制。
A many-mode Floquet theory (MMFT) formalism is applied to study the interaction of a polychromatic rf field with cold atoms trapped in a quadrupole magnetic trap. The validity of the MMFT approach is first established by comparing its results with those of the previously used formalisms for the cases of single- and two-frequency rf fields. The effect of truncation of the infinite matrices has been studied and a suitable truncation order is obtained for the numerical implementations. The results obtained for the composite atom–field system has shown some exquisite features such as lattice-like periodic variation in the eigen-energies and large two-photon transition probabilities between the atomic states. Dependence of the trapping parameters such as trap position, depth and width on the rf field parameters like field strength and mode separation has also been studied. This work predicts the generation of lattice type atom-trapping geometries which can be controlled by varying the rf field parameters of a polychromatic rf field.