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Title: Measuring spatially extended density profiles using atom-cavity collective strong coupling to higher-order modes
Authors: Niranjan, M.
Dutta, Sourav
Ray, Tridib
Rangwala, S.A.
Issue Date: Mar-2019
Publisher: American Physical Society
Citation: Physical Review A, 2019, Vol.99, p 033617
Abstract: The collective strong coupling of rubidium atoms in a magneto-optical trap (MOT) to the Laguerre-Gaussian (LG) modes of a Fabry-Pérot cavity is investigated. Bright and dark 85Rb MOT atoms are prepared at the geometric center of the cavity, and the vacuum Rabi splitting (VRS) of the collectively coupled atom-cavity system is measured for LGl0 (l = 0, 1, 2, 3) modes. The atom number coupled to the cavity mode depends on the overlap of the atomic density distribution and the specific spatial mode function, which is reflected in the measured VRS spectrum. The known mode function and the measured VRS can then be used to test whether the atomic density distribution in the experiment is Gaussian or uniform. A simple theoretical model for this process is described, and the experimental measurements are found to be in close agreement with the model.
Description: Open Access
ISSN: 2469-9926
2469-9934 (online)
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Copyright: 2019 American Physical Society
Appears in Collections:Research Papers (LAMP)

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