Hannover 2013 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 6: Ultra-cold atoms, ions and BEC II (with Q)
A 6.3: Vortrag
Montag, 18. März 2013, 14:30–14:45, F 428
A SU(N) symmetric Fermi degenerate gas of ytterbium for lattice many-body physics — •F. Scazza, C. Hofrichter, P. C. De Groot, M. Höfer, C. Schweizer, E. Davis, I. Bloch, and S. Fölling — MPI für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching and Ludwig-Maximilians-Universität, Schellingstrasse 4, 80799 München, Germany
Ytterbium and other alkaline-earth-like atoms have some peculiar properties compared to alkali atoms which make them very attractive in the context of quantum simulation with ultracold atoms, especially in the presence of periodic potentials such as optical lattices.
Ytterbium possesses a metastable excited state which can be used to implement state-dependent optical lattices, enabling the simulation of new complex types of many-body Hamiltonians, e.g. the Kondo lattice model. In addition, the high nuclear spin of the fermionic 173Yb, which is highly decoupled from the electronic state, gives rise to an enlarged SU(N) symmetry of the many-body Hamiltonian.
We describe preparation and detection of the nuclear and electronic spin state populations of a degenerate Fermi gas of Yb in the “magic lattice”, used for coupling to the 3P0 metastable state via a narrow line “clock” laser on the doubly forbidden clock transition.