An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice

Johann G. Danzl, Manfred J. Mark, Elmar Haller, Mattias Gustavsson, Russell Hart, Jesus Aldegunde, Jeremy M. Hutson, Hanns-Christoph Nägerl

Research output: Contribution to journalArticle

234 Citations (Scopus)

Abstract

Control over all internal and external degrees of freedom of molecules at the level of single quantum states will enable a series of fundamental studies in physics and chemistry(1,2). In particular, samples of ground-state molecules at ultralow temperatures and high number densities will facilitate new quantum-gas studies(3) and future applications in quantum information science(4). However, high phase-space densities for molecular samples are not readily attainable because efficient cooling techniques such as laser cooling are lacking. Here we produce an ultracold and dense sample of molecules in a single hyperfine level of the rovibronic ground state with each molecule individually trapped in the motional ground state of an optical lattice well. Starting from a zero-temperature atomic Mott-insulator state(5) with optimized double-site occupancy(6), weakly bound dimer molecules are efficiently associated on a Feshbach resonance(7) and subsequently transferred to the rovibronic ground state by a stimulated four-photon process with >50% efficiency. The molecules are trapped in the lattice and have a lifetime of 8 s. Our results present a crucial step towards Bose-Einstein condensation of ground-state molecules and, when suitably generalized to polar heteronuclear molecules, the realization of dipolar quantum-gas phases in optical lattices(8-10).
Original languageEnglish
Pages (from-to)265-270
Number of pages6
JournalNature Physics
Volume6
Issue number4
Early online date21 Feb 2010
DOIs
Publication statusPublished - 1 Apr 2010

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ground state
molecules
laser cooling
space density
cryogenic temperature
condensation
degrees of freedom
dimers
insulators
chemistry
vapor phases
cooling
life (durability)
physics
photons
gases
temperature

Keywords

  • optical lattices
  • rovibronic molecules
  • ultracold molecules

Cite this

Danzl, J. G., Mark, M. J., Haller, E., Gustavsson, M., Hart, R., Aldegunde, J., ... Nägerl, H-C. (2010). An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice. Nature Physics, 6(4), 265-270. https://doi.org/10.1038/nphys1533
Danzl, Johann G. ; Mark, Manfred J. ; Haller, Elmar ; Gustavsson, Mattias ; Hart, Russell ; Aldegunde, Jesus ; Hutson, Jeremy M. ; Nägerl, Hanns-Christoph. / An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice. In: Nature Physics. 2010 ; Vol. 6, No. 4. pp. 265-270.
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Danzl, JG, Mark, MJ, Haller, E, Gustavsson, M, Hart, R, Aldegunde, J, Hutson, JM & Nägerl, H-C 2010, 'An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice', Nature Physics, vol. 6, no. 4, pp. 265-270. https://doi.org/10.1038/nphys1533

An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice. / Danzl, Johann G.; Mark, Manfred J.; Haller, Elmar; Gustavsson, Mattias; Hart, Russell; Aldegunde, Jesus; Hutson, Jeremy M.; Nägerl, Hanns-Christoph.

In: Nature Physics, Vol. 6, No. 4, 01.04.2010, p. 265-270.

Research output: Contribution to journalArticle

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