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Q: Fachverband Quantenoptik und Photonik
Q 52: Quantum gases: Fermions
Q 52.6: Talk
Thursday, March 21, 2013, 15:30–15:45, F 342
Production of Ultracold Gases of Ytterbium in a 2D-/3D-MOT Setup — •Sören Dörscher, Alexander Thobe, Bastian Hundt, André Kochanke, Christoph Becker, and Klaus Sengstock — Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
Quantum gases of two-electron atoms are an exciting new branch within the field of ultracold atoms. Due to their complex level structure and unique features new phenomena such as SU(N)-symmetric spin Hamiltonians, artificial gauge fields or the Kondo lattice model can be studied.
Here we report on a novel experimental setup to produce quantum degenerate Yb gases based on a 2D-/3D-MOT scheme without use of a Zeeman slower. The 2D-MOT operated on the strong 1S0−1P1 transition captures Yb directly from a thermal beam of atoms and loads a 3D-MOT on the narrow 1S0−3P1 intercombination transition. Subsequently, atoms are transferred into a crossed optical dipole trap and evaporatively cooled to quantum degeneracy. We routinely produce Bose-Einstein condensates of 174Yb with 1 · 105 atoms and degenerate Fermi gases of the spin-5/2 isotope 173Yb with typically 2 · 104 particles at T/TF=0.35. We then prepare and study the ultracold gases in a triangular optical lattice by spectroscopy on the ultranarrow 1S0−3P0 transition.
This work is supported by the DFG within the SFB 925 and GRK 1355 and the EU FET-Open Scheme (iSense).