Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state.
Phys Rev Lett
; 113(20): 205301, 2014 Nov 14.
Article
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| MEDLINE
| ID: mdl-25432045
ABSTRACT
We produce ultracold dense trapped samples of ^{87}Rb^{133}Cs molecules in their rovibrational ground state, with full nuclear hyperfine state control, by stimulated Raman adiabatic passage (STIRAP) with efficiencies of 90%. We observe the onset of hyperfine-changing collisions when the magnetic field is ramped so that the molecules are no longer in the hyperfine ground state. A strong quadratic shift of the transition frequencies as a function of applied electric field shows the strongly dipolar character of the RbCs ground-state molecule. Our results open up the prospect of realizing stable bosonic dipolar quantum gases with ultracold molecules.