Ultracold Dense Samples of Dipolar RbCs Molecules in the Rovibrational and Hyperfine Ground State

Takekoshi, Tetsu; Reichsöllner, Lukas; Schindewolf, Andreas; Hutson, Jeremy M.; Le Sueur, C. Ruth; Dulieu, Olivier; Ferlaino, Francesca; Grimm, Rudolf; Nägerl, Hanns-Christoph

Abstract

We produce ultracold dense trapped samples of Rb87Cs133 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.

Citation

Takekoshi, T., Reichsöllner, L., Schindewolf, A., Hutson, J. M., Le Sueur, C. R., Dulieu, O., …Nägerl, H. (2014). Ultracold Dense Samples of Dipolar RbCs Molecules in the Rovibrational and Hyperfine Ground State. Physical Review Letters, 113, Article 205301. https://doi.org/10.1103/physrevlett.113.205301

• Journal Article Type: Article
• Acceptance Date: May 23, 2013
• Online Publication Date: Nov 12, 2014
• Publication Date: Nov 12, 2014
• Deposit Date: Nov 13, 2014
• Publicly Available Date: Dec 2, 2014
• Journal: Physical Review Letters
• Print ISSN: 0031-9007
• Electronic ISSN: 1079-7114
• Publisher: American Physical Society
• Peer Reviewed: Peer Reviewed
• Volume: 113
• Article Number: 205301
• DOI: https://doi.org/10.1103/physrevlett.113.205301