Ultracold triplet molecules in the rovibrational ground state.

  title={Ultracold triplet molecules in the rovibrational ground state.},
  author={F Lang and K Winkler and C Strauss and R Grimm and J Hecker Denschlag},
  journal={Physical review letters},
  volume={101 13},
  • F Lang, K Winkler, +2 authors J Hecker Denschlag
  • Published 2008 in Physical review letters
We report here on the production of an ultracold gas of tightly bound Rb2 triplet molecules in the rovibrational ground state, close to quantum degeneracy. This is achieved by optically transferring weakly bound Rb2 molecules to the absolute lowest level of the ground triplet potential with a transfer efficiency of about 90%. The transfer takes place in a 3D optical lattice which traps a sizeable fraction of the tightly bound molecules with a lifetime exceeding 200 ms. 

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