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Efficient state transfer in an ultracold dense gas of heteronuclear molecules

Ospelkaus, S
; 
Pe'er, A
; 
Ni, KK
; 
Zirbel, JJ
; 
Neyenhuis, B
; 
Kotochigova, S
; 
Julienne, PS
; 
Ye, J
; 
Jin, DS
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Journal Article
Date
2008-01-01
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physics.atom-ph
 physics.atom-ph
 cond-mat.other
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http://hdl.handle.net/20.500.12613/6095
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DOI
10.1038/nphys997
Abstract
Polar molecules have bright prospects for novel quantum gases with long-range and anisotropic interactions, and could find uses in quantum information science and in precision measurements. However, high-density clouds of ultracold polar molecules have so far not been produced. Here, we report a key step towards this goal. We start from an ultracold dense gas of loosely bound 40 K 87 Rb Feshbach molecules with typical binding energies of a few hundred kilohertz, and coherently transfer these molecules in a single transfer step into a vibrational level of the ground-state molecular potential bound by more than 10 GHz. Starting with a single initial state prepared with Feshbach association, we achieve a transfer efficiency of 84%. Given favourable Franck-Condon factors, the presented technique can be extended to access much more deeply bound vibrational levels and those exhibiting a significant dipole moment. © 2008 Macmillan Publishers Limited. All rights reserved.
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Springer Science and Business Media LLC
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Nature Physics
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