Two methods to deal with inhomogenous Rabi frequency in microwave transition

doi:10.1088/1674-1056/21/7/070309

Abstract We analysed the influence of inhomogenous microwave field on the coherence of atom ensembles. Two methods were proposed to suppress the dephasing generated by the inhomogenous Rabi frequency. One of them was realized by spin echo, and the other one was based on the identical spin rotation effect. The results of calculation showed that the contrast of signal acquired in experiment can be improved by the two methods. Their advantages and drawbacks were discussed. We hope they could be used to improve the contrast of experimental signal in the situation that the microwave fields are very inhomogenous. Finally, we discussed the case of continuous working microwave field and showed that the dipole force raised with the inhomogeneity can be eased by spin flip.

Keywords: inhomogenous microwave field spin echo identical spin rotation effect

Received: 11 January 2012
Revised: 16 April 2012
Accepted manuscript online:

PACS:	03.65.Yz	(Decoherence; open systems; quantum statistical methods)
	03.75.Be	(Atom and neutron optics)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2011CB921504) and the National Natural Science Foundation of China (Grant No. 10974210).

Corresponding Authors: Wang Yu-Zhu
E-mail: yzwang@mail.shcnc.ac.cn

Cite this article:

Cheng Feng(程峰) and Wang Yu-Zhu(王育竹) Two methods to deal with inhomogenous Rabi frequency in microwave transition 2012 Chin. Phys. B 21 070309

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