Seminar
Tuesday, 10 May, 2011
Group Seminar LMU: Probing Nearest-Neighbor Correlations of Ultracold Fermions in an Optical Lattice
Tuesday, 10.05.2011 10 a.m. (s.t.) in H107, Fakultät für Physik LMU
Daniel Greif, Quantum Optics Group, ETH Zurich
The Fermi-Hubbard Hamiltonian is one of the key models for strongly correlated electrons in condensed matter systems and incorporates fascinating phenomena such as Mott-insulating behavior or spin ordered phases. In our experiment we use a two-component Fermi gas loaded into a simple cubic 3D optical lattice to realize and study this simple model Hamiltonian.
Currently several experiments are reaching out to access the low entropy regime of quantum magnetism. I will report on measurements of nearest-neighbor correlations, which can be used to detect local spin ordering. I will also present progress on preparation and characterization of cold fermionic gases in the lattice using an optical superlattice and an entropy redistribution scheme.