Two methods to deal with an inhomogenous Rabi frequency in microwave transition

Two methods to deal with an inhomogenous Rabi frequency in microwave transition
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处理微波跃迁中拉比频率不均匀的两种方法

DOI:
10.1088/1674-1056/21/7/070309
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发表时间:
2012-07
期刊:
影响因子:
1.7
通讯作者:
Wang Yu-Zhu
Wang Yu-Zhu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cheng Feng;Wang Yu-Zhu

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分析了非均匀微波场对原子系综相干性的影响。提出了两种方法来抑制由非均匀拉比频率产生的失相。其中一种是利用自旋回波实现的,另一种是基于相同的自旋旋转效应。计算结果表明,这两种方法都能提高实验信号的对比度。讨论了它们的优缺点。我们希望他们可以用来提高对比度的情况下,微波场是非常不均匀的实验信号。最后,我们讨论了一个连续的工作微波场的情况下,并表明,偶极子力的不均匀性,可以减轻自旋翻转。
We analyse the influence of an inhomogenous microwave field on the coherence of atom ensembles. Two methods are proposed to suppress the dephasing generated by the inhomogenous Rabi frequency. One of them is realized by using a spin echo, and the other one is based on the identical spin rotation effect. The calculation results show that the contrast of a signal acquired in experiment can be improved by using the two methods. Their advantages and drawbacks are discussed. We hope they can be used to improve the contrast of experimental signals in situations where microwave fields are very inhomogenous. Finally, we discuss the case of a continuous working microwave field and show that the dipole force raised with the inhomogeneity can be eased by spin flip.
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