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Production of optically trapped Feshbach molecules.

Köppinger, M.P. and McCarron, D.J. and Jenkin, D.L. and Molony, P.K. and Cho, H.W. and Cornish, S.L. and LeSueur, C.R. and Blackley, C.L. and Hutson, J.M. (2014) 'Production of optically trapped Feshbach molecules.', Physical review A : atomic, molecular and optical physics., 89 (3). 033604.


We report the production of Feshbach molecules in a crossed-beam dipole trap. A mixture of and is cooled close to quantum degeneracy before an interspecies Feshbach resonance at 197 G is used to associate up to molecules with a temperature of nK. The molecules are confined in the dipole trap with a lifetime of 0.21(1) s, long enough for future experiments exploring optical transfer to the absolute ground state. We have measured the magnetic moment of the Feshbach molecules in a magnetic bias field range between 181 and 185 G to demonstrate the ability to control the character of the molecular state. In addition, we have performed Feshbach spectroscopy in a field range from 0 to 1200 G and located three previously unobserved resonances at high magnetic fields.

Item Type:Article
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Publisher statement:© 2014 American Physical Society
Date accepted:12 December 2013
Date deposited:25 March 2014
Date of first online publication:05 March 2014
Date first made open access:No date available

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