Quasi-2D Fermi-Bose mixture in an optical lattice

We give an overview on our current experiments with Bose-Fermi degenerate mixtures in a one dimensional (1D) optical lattice. Our system consists of a Fermi gas of K-40 atoms and a Bose-Einstein condensate of Rb-87. The two species are simultaneously trapped in a combined magnetic and optical lattice potential. We have investigated the thermodynamical properties of the mixture in a tight lattice and observed a change in the density of states. This is a signature of a quasi two dimensional confinement of the atoms in the lattice sites. We also discuss the mechanical stability of the mixture in presence of the 1D lattice.