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

Tetsu Takekoshi, Lukas Reichsöllner, Andreas Schindewolf, Jeremy M. Hutson, C. Ruth Le Sueur, Olivier Dulieu, Francesca Ferlaino, Rudolf Grimm, and Hanns-Christoph Nägerl
Phys. Rev. Lett. 113, 205301 – Published 12 November 2014
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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.

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  • Received 23 May 2014

DOI:https://doi.org/10.1103/PhysRevLett.113.205301

© 2014 American Physical Society

Authors & Affiliations

Tetsu Takekoshi1,2, Lukas Reichsöllner1, Andreas Schindewolf1, Jeremy M. Hutson3, C. Ruth Le Sueur3, Olivier Dulieu4, Francesca Ferlaino1, Rudolf Grimm1,2, and Hanns-Christoph Nägerl1

  • 1Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria
  • 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Austria
  • 3Joint Quantum Centre (JQC) Durham/Newcastle, Department of Chemistry, Durham University, South Road, Durham DH1 3LE, United Kingdom
  • 4Laboratoire Aimé Cotton, CNRS, Université Paris-Sud, Bâtiment 505, 91405 Orsay Cedex, France

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Issue

Vol. 113, Iss. 20 — 14 November 2014

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