%0 Journal Article
%T Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
%A Tetsu Takekoshi
%A Lukas Reichs£¿llner
%A Andreas Schindewolf
%A Jeremy M. Hutson
%A C. Ruth Le Sueur
%A Olivier Dulieu
%A Francesca Ferlaino
%A Rudolf Grimm
%A Hanns-Christoph N£¿gerl
%J Physics
%D 2014
%I arXiv
%R 10.1103/PhysRevLett.113.205301
%X We produce ultracold dense trapped samples of 87Rb133Cs 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.
%U http://arxiv.org/abs/1405.6037v3