Sub-natural linewidth of the probe absorption spectrum in a cold Cs atom--molecule system

doi:10.1088/1674-1056/18/11/047

Abstract

Abstract We theoretically analysed the linewidth of the probe absorption spectrum in a cold Cs atom--molecule system. The tunnelling coupling between the two excited molecular states, especially for the Cs atom--molecule system, plays an important role in obtaining the sub-natural linewidth of the probe absorption spectrum. For example, when the tunnelling couple strength fulfils $\sigma_{12}=10\gamma_{ab_1}$, the linewidth is only about 0.66 MHz. Moreover, since the linewidth of interest is dominated by the tunnelling coupling, the absorption peak becomes very narrow even in the case of large pump laser intensities.

Keywords: sub-natural linewidth tunnelling coupling

Received: 19 January 2009
Revised: 27 February 2009
Accepted manuscript online:

PACS:	32.70.Jz	(Line shapes, widths, and shifts)
	33.70.Jg	(Line and band widths, shapes, and shifts)
	31.15.-p	(Calculations and mathematical techniques in atomic and molecular physics)

Fund: Project supported by the National Natural Science Foundation of China (Grant Nos 10444002, 10674087 and 10574084), 973 program (Grant Nos 2006CB921603 and 2008CB317103), SRF for ROCS, SEM, SRF for ROCS, Ministry of Personal of China and SRF for ROCS of Shanxi Province of China.

Cite this article:

Feng Zhi-Fang(冯志芳), Li Wei-Dong(李卫东), Xiao Lian-Tuan(肖连团), and Jia Suo-Tang(贾锁堂) Sub-natural linewidth of the probe absorption spectrum in a cold Cs atom--molecule system 2009 Chin. Phys. B 18 4901

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Sub-natural linewidth of the probe absorption spectrum in a cold Cs atom--molecule system

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