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Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation.

Ji, Zhonghua and Gong, Ting and He, Yonglin and Hutson, Jeremy M. and Zhao, Yanting and Xiao, Liantuan and Jia, Suotang (2020) 'Microwave coherent control of ultracold ground-state molecules formed by short-range photoassociation.', Physical chemistry chemical physics., 22 (23). pp. 13002-13007.


We report the observation of microwave coherent control of rotational states of ultracold 85Rb133Cs molecules formed in their vibronic ground state by short-range photoassociation. Molecules are formed in the single rotational state X(v = 0, J = 1) by exciting pairs of atoms to the short-range state (2)3Π0−(v = 11, J = 0), followed by spontaneous decay. We use depletion spectroscopy to record the dynamic evolution of the population distribution and observe clear Rabi oscillations while irradiating on a microwave transition between coupled neighbouring rotational levels. A density-matrix formalism that accounts for longitudinal and transverse decay times reproduces both the dynamic evolution during the coherent process and the equilibrium population. The coherent control reported here is valuable both for investigating coherent quantum effects and for applications of cold polar molecules produced by continuous short-range photoassociation.

Item Type:Article
Full text:(AM) Accepted Manuscript
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Date accepted:25 May 2020
Date deposited:09 July 2020
Date of first online publication:25 May 2020
Date first made open access:25 May 2021

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