Dresden 2011 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 57: Poster 3: Quantengase, Ultrakalte Atome, Ultrakalte Moleküle, Materiewellen Optik, Präzisionsmessungen, Metrologie
Q 57.40: Poster
Thursday, March 17, 2011, 16:30–19:30, P1
Interacting Fermions in Optical Lattices - Exploring the Fermi-Hubbard Hamiltonian — •Jens Philipp Ronzheimer1, Lucia Hackermüller2, Simon Braun1, Michael Schreiber1, Tim Rom1, Sebastian Will1, Thorsten Best3, Ulrich Schneider1, and Immanuel Bloch1 — 1LMU München & MPQ Garching — 2U Nottingham — 3ALU Freiburg
Fermions in optical lattices can constitute an ideal and defect-free implementation of the Fermi-Hubbard Hamiltonian. While being more accessible to measurements than condensed matter systems, they allow at the same time for the direct manipulation of all relevant parameters.
We report on experiments with a two-component ultracold Fermi gas of 40K atoms in a blue detuned lattice. Previous experiments regarding equilibrium states of the Fermi-Hubbard Hamiltonian as well as results on the dynamics of out-of-equilibrium states in the homogeneous Hubbard model are presented.
The experimental setup allows for a variety of experiments with Bose-Fermi and Fermi-Fermi mixtures in optical lattices in 1,2 and 3 dimensions. Employing a red detuned Dipole trap and a blue detuned lattice at tunable wavelength, we are able to adjust every parameter of the respective Hamiltonians individually. The experimental setup has been rebuilt after moving to the LMU in Munich and we present the improved parameters as well as an analysis of current challenges and ways to overcome them.