QUANTUM DEGENERATE BOSONS AND FERMIONS IN A 1D OPTICAL LATTICE

摘要

We review our recent experiments on ultracold and quantum degenerate samples of bosonic and fermionic atoms in 1D optical lattices. We study the expansion and the collective excitations of a Bose-Einstein condensate in the lattice, showing how the dynamics is governed by a tunable effective mass. We then study the dipolar oscillations of a Fermi gas along the lattice, which reveal band-structure effects. The comparison with the dynamics of ultracold bosons allows us to identify a strong effect of atomic collisions in the lattice.