Density redistribution effects in fermionic optical lattices

Commensurability effects for fermionic atoms trapped in 1D optical lattices.

Fermionic atoms in two different hyperfine states confined in optical lattices show strong commensurability effects due to the interplay between the atomic density wave ordering and the lattice potential. We show that spatially separated regions of commensurable and incommensurable phases can coexist. The commensurability between the harmonic trap and the lattice sites can be used to control th...

Interacting fermionic atoms in optical lattices diffuse symmetrically upwards and downwards in a gravitational potential.

We consider a cloud of fermionic atoms in an optical lattice described by a Hubbard model with an additional linear potential. While homogeneous interacting systems mainly show damped Bloch oscillations and heating, a finite cloud behaves differently: It expands symmetrically such that gains of potential energy at the top are compensated by losses at the bottom. Interactions stabilize the neces...

Quantum measures for density correlations in optical lattices

The density-density correlation profiles obtained superimposing absorption images from atomic clouds freely expanding after the release of the confining optical lattice can be theoretically described in terms of a generalized quantum measure based on coherentlike states. We show that the corresponding density patterns differ in a testable way from those computed using standard many-body mean va...

Pi Phases in Balanced Fermionic Superfluids on Spin-Dependent Optical Lattices

Magnetic ordering of three-component ultracold fermionic mixtures in optical lattices

We study finite-temperature magnetic phases of three-component mixtures of ultracold fermions with repulsive interactions in optical lattices with simple cubic or square geometry by means of dynamical mean-field theory (DMFT). We focus on the case of one particle per site (1/3 band filling) at moderate interaction strength, where we observe a sequence of thermal phase transitions into twoand th...