The Fermi-Hubbard model is a key concept in condensed matter physics and provides
crucial insights into electronic and magnetic properties of materials. Yet, the intricate nature …

Interactions are known to have dramatic effects on bosonic gases in one dimension (1D).
Not only does the ground state transform from a condensate like state to an effective Fermi …

We perform a detailed experimental study of the band excitations and tunneling properties of
ultracold fermions in optical lattices. Employing a novel multiband spectroscopy for fermionic …

We investigate the coherence properties of an array of one-dimensional Bose gases with
short-scale phase fluctuations. The momentum distribution is measured using Bragg …

We show how to realize topologically protected crossings of three energy bands, integer-
spin analogs of Weyl fermions, in three-dimensional optical lattices. Our proposal only …

We report on the experimental observation of an analog to a persistent alternating
photocurrent in an ultracold gas of fermionic atoms in an optical lattice. The dynamics is …

We investigate experimentally and theoretically the dynamical properties of a Mott insulator
in decoupled one-dimensional chains. Using a theoretical analysis of the Bragg excitation …

We consider an atomic Bose-Einstein condensate trapped in a symmetric one-dimensional
double-well potential in the four-mode approximation and show that the semiclassical …

Bosonic lattice systems with extended interactions constitute a unique platform to study new
phases of matter. This work presents an analysis of the Bose–Hubbard model with density …

We present a comprehensive experimental study of Tan's universal contact parameter in a
two-component ultracold Fermi gas, using Bragg spectroscopy. The contact uniquely …