Dresden 2011 – wissenschaftliches Programm
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SAMOP-DP: SAMOP Dissertation Prize 2011
SAMOP-DP 1: S-AMOP Dissertation Prize Symposium
SAMOP-DP 1.1: Hauptvortrag
Dienstag, 15. März 2011, 10:30–11:00, MENSA Dül
Rovibronic ground state molecules near quantum degeneracy — •Johann Georg Danzl — Institut für Experimentalphysik, Universität Innsbruck, Innsbruck, Austria
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. High phase-space density samples of molecules in a defined internal state, most notably in the lowest internal quantum state, will allow novel quantum gas experiments, cold controlled chemistry, quantum information, and quantum simulation experiments. We create ultracold and dense samples of molecules prepared in a single hyperfine sublevel of the rovibronic ground state while each molecule is trapped in the motional ground state of an optical lattice well. Starting from an atomic Mott-insulator state with optimized double-site occupancy, weakly bound Cs2 molecules are efficiently formed on a Feshbach resonance and subsequently transferred to the rovibronic ground state by a coherent 4-photon process with the Stimulated Raman Adiabatic Passage technique. The molecules are trapped in the lattice with a lifetime of 8 s. We now aim to produce a Bose-Einstein condensate of ground state molecules by adiabatically removing the optical lattice potential. Our results can readily be generalized to heteronuclear polar molecules such as RbCs, opening up the possibility for creating dipolar quantum gas systems with long range and anisotropic interactions.