Quantum gases in optical lattices offer an opportunity to experimentally realize and explore
condensed matter models in a clean, tunable system. We used single atom–single lattice …

Fermionic alkaline-earth atoms have unique properties that make them attractive candidates
for the realization of atomic clocks and degenerate quantum gases. At the same time, they …

We report on a detailed experimental investigation of the equation of state (EoS) of the three-
dimensional Fermi-Hubbard model (FHM) in its generalized SU (N)-symmetric form, using a …

We report on the experimental implementation of tunable occupation-dependent tunneling
in a Bose-Hubbard system of ultracold atoms via time-periodic modulation of the on-site …

Alkaline-earth atoms have metastable 'clock'states with minute-long optical lifetimes, high-
spin nuclei and SU (N)-symmetric interactions, making them powerful platforms for atomic …

The evolution of on-site number fluctuations of ultracold atoms in optical lattices is
experimentally investigated by monitoring the suppression of spin-changing collisions …

We study a two-level atom coupled to a Bose-Einstein condensate. We show that the rules
governing the decoherence of mesoscopic superpositions involving different classical-like …

We study the splitting of a harmonically trapped atomic Bose-Einstein condensate when we
continuously turn up an optical lattice (or a double-well) potential. As the lattice height is …

We study how macroscopic superpositions of coherent states produced by the
nondissipative dynamics of binary mixtures of ultracold atoms are affected by atom losses …

This thesis describes experiments which investigate ultracold atom ensembles in an optical
lattice. Such quantum gases are powerful models for solid state physics. Several novel …