Ultracold and dense samples of ground-state molecules in lattice potentials

Hanns-Christoph Nägerl, Manfred J Mark, Elmar Haller, Mattias Gustavsson, Russell Hart, Johann G Danzl

Research output: Contribution to journal › Article

3 Citations (Scopus)

Abstract

We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.
LanguageEnglish
Article number012015
JournalJournal of Physics Conference Series
Volume264
DOIs
Publication statusPublished - 1 Jan 2011

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ground state
molecules
Bose-Einstein condensates
dimers
insulators
vapor phases
life (durability)
preparation
photons
temperature

Keywords

  • lattice potentials
  • quantum degeneracy
  • Feshbach resonance
  • optical lattice
  • optics

Cite this

Nägerl, Hanns-Christoph ; Mark, Manfred J ; Haller, Elmar ; Gustavsson, Mattias ; Hart, Russell ; Danzl, Johann G. / Ultracold and dense samples of ground-state molecules in lattice potentials. In: Journal of Physics Conference Series. 2011 ; Vol. 264.
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abstract = "We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50{\%} efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.",
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Nägerl, H-C, Mark, MJ, Haller, E, Gustavsson, M, Hart, R & Danzl, JG 2011, 'Ultracold and dense samples of ground-state molecules in lattice potentials' Journal of Physics Conference Series, vol. 264, 012015. https://doi.org/10.1088/1742-6596/264/1/012015

Ultracold and dense samples of ground-state molecules in lattice potentials. / Nägerl, Hanns-Christoph; Mark, Manfred J; Haller, Elmar; Gustavsson, Mattias; Hart, Russell; Danzl, Johann G.

In: Journal of Physics Conference Series, Vol. 264, 012015, 01.01.2011.

Research output: Contribution to journal › Article

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T1 - Ultracold and dense samples of ground-state molecules in lattice potentials

AU - Nägerl, Hanns-Christoph

AU - Mark, Manfred J

AU - Haller, Elmar

AU - Gustavsson, Mattias

AU - Hart, Russell

AU - Danzl, Johann G

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N2 - We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.

AB - We produce an ultracold and dense sample of rovibronic ground state Cs(2) molecules close to the regime of quantum degeneracy, in a single hyperfine level, in the presence of an optical lattice. The molecules are individually trapped, in the motional ground state of an optical lattice well, with a lifetime of 8 s. For preparation, we start with a zero-temperature atomic Mott-insulator state with optimized double-site occupancy and efficiently associate weakly-bound dimer molecules on a Feshbach resonance. Despite extremely weak Franck-Condon wavefunction overlap, the molecules are subsequently transferred with >50% efficiency to the rovibronic ground state by a stimulated four-photon process. Our results present a crucial step towards the generation of Bose-Einstein condensates of ground-state molecules and, when suitably generalized to polar heteronuclear molecules such as RbCs, the realization of dipolar many-body quantum-gas phases in periodic potentials.

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Nägerl H-C, Mark MJ, Haller E, Gustavsson M, Hart R, Danzl JG. Ultracold and dense samples of ground-state molecules in lattice potentials. Journal of Physics Conference Series. 2011 Jan 1;264. 012015. https://doi.org/10.1088/1742-6596/264/1/012015

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