TY - JOUR
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
PY - 2011/1/1
Y1 - 2011/1/1
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.
KW - lattice potentials
KW - quantum degeneracy
KW - Feshbach resonance
KW - optical lattice
KW - optics
UR - http://stacks.iop.org/1742-6596/264/i=1/a=012015?key=crossref.39ffb55779d6ea741f07b32667718685
U2 - 10.1088/1742-6596/264/1/012015
DO - 10.1088/1742-6596/264/1/012015
M3 - Article
VL - 264
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
M1 - 012015
ER -