An ultracold high-density sample of rovibronic ground-state molecules in an optical lattice
Danzl, J.G.; Mark, M.J.; Haller, E.; Gustavsson, M.; Hart, R.; Aldegunde, J.; Hutson, J.M.; Nägerl, H.C.
Professor Jeremy Hutson firstname.lastname@example.org
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. In particular, samples of ground-state molecules at ultralow temperatures and high number densities will facilitate new quantum-gas studies and future applications in quantum information science. 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 with optimized double-site occupancy, weakly bound dimer molecules are efficiently associated on a Feshbach resonance 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.
Danzl, J., Mark, M., Haller, E., Gustavsson, M., Hart, R., Aldegunde, J., …Nägerl, H. (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
|Journal Article Type||Article|
|Publication Date||Apr 1, 2010|
|Deposit Date||Feb 2, 2012|
|Publicly Available Date||Jul 10, 2013|
|Peer Reviewed||Peer Reviewed|
Accepted Journal Article
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