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Creation of ultracold 87Rb133Cs molecules in the rovibrational ground state.

Molony, Peter K. and Gregory, Philip D. and Ji, Zhonghua and Lu, Bo and Köppinger, Michael P. and Le Sueur, C. Ruth and Blackley, Caroline L. and Hutson, Jeremy M. and Cornish, Simon L. (2014) 'Creation of ultracold 87Rb133Cs molecules in the rovibrational ground state.', Physical review letters., 113 (25). p. 255301.


We report the creation of a sample of over 1000 ultracold Rb 87 Cs 133 molecules in the lowest rovibrational ground state, from an atomic mixture of Rb 87 and Cs 133 , by magnetoassociation on an interspecies Feshbach resonance followed by stimulated Raman adiabatic passage (STIRAP). We measure the binding energy of the RbCs molecule to be hc×3811.576(1)  cm −1 and the |v '' =0,J '' =0⟩ to |v '' =0,J '' =2⟩ splitting to be h×2940.09(6)  MHz . Stark spectroscopy of the rovibrational ground state yields an electric dipole moment of 1.225(3)(8) D, where the values in parentheses are the statistical and systematic uncertainties, respectively. We can access a space-fixed dipole moment of 0.355(2)(4) D, which is substantially higher than in previous work.

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Publisher statement:Reprinted with permission from the American Physical Society: Physical Review Letters 113, 255301 © 2014 by the American Physical Society. Readers may view, browse, and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or part, without prior written permission from the American Physical Society.
Date accepted:12 November 2014
Date deposited:02 April 2015
Date of first online publication:17 December 2014
Date first made open access:No date available

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