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Controlling the rotational and hyperfine state of ultracold Rb87Cs133 molecules.

Gregory, P.D. and Aldegunde, J. and Hutson, J.M. and Cornish, S.L. (2016) 'Controlling the rotational and hyperfine state of ultracold Rb87Cs133 molecules.', Physical review., 94 (4). 041403(R).


We demonstrate coherent control of the rotational and hyperfine state of ultracold, chemically stable Rb87Cs133 molecules with external microwave fields. We create a sample of ∼2000 molecules in the lowest hyperfine level of the rovibronic ground state N=0. We measure the transition frequencies to eight different hyperfine levels of the N=1 state at two magnetic fields ∼23 G apart. We determine accurate values of rotational and hyperfine coupling constants that agree well with previous calculations. We observe Rabi oscillations on each transition, allowing complete population transfer to a selected hyperfine level of N=1. Subsequent application of a second microwave pulse allows the transfer of molecules back to a different hyperfine level of N=0.

Item Type:Article
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Publisher statement:Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
Date accepted:16 September 2016
Date deposited:31 October 2016
Date of first online publication:28 October 2016
Date first made open access:No date available

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