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arXiv 1209.0613physics.atom-ph
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Rb原子的态不敏感囚禁:线偏振光和圆偏振光

State-insensitive trapping of Rb atoms: linearly versus circularly polarized lights

Bindiya Arora, B. K. Sahoo

摘要:

通过计算线偏振光和圆偏振光的动态极化率,研究了铷原子5s和5p态的交流斯塔克位移的抵消。矩阵元素的计算使用相对论耦合簇方法在单,双和重要的三价激发近似,包括所有可能的非线性相关项。一些重要的矩阵元素进一步优化使用的实验结果,原子态的寿命和静态极化率。“魔术波长”确定的差分斯塔克位移和线性偏振光的结果与以前可用的结果进行了比较。讨论了利用圆偏振光的魔波长实现状态不敏感光阱的可能范围。利用优化后的矩阵元,改善了该原子4d和6s态的寿命。

英文摘要:

We study the cancellation of differential ac Stark shifts in the 5s and 5p states of rubidium atom using the linearly and circularly polarized lights by calculating their dynamic polarizabilities. Matrix elements were calculated using a relativistic coupled-cluster method at the single, double and important valence triple excitations approximation including all possible non-linear correlation terms. Some of the important matrix elements were further optimized using the experimental results available for the lifetimes and static polarizabilities of atomic states. "Magic wavelengths" are determined from the differential Stark shifts and results for the linearly polarized light are compared with the previously available results. Possible scope of facilitating state-insensitive optical trapping schemes using the magic wavelengths for circularly polarized light are discussed. Using the optimized matrix elements, the lifetimes of the 4d and 6s states of this atom are ameliorated.

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