Collective modes of ultracold fermionic alkaline-earth-metal gases with SU( N ) symmetry

Two-orbital SU(N) magnetism with ultracold alkaline-earth atoms

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 are attracting considerable theoretical attention in the context of quantum information processing. Here we demonstrate that when such atoms are loaded in optical lattices, they can be used as quantum simulators of u...

Magnetic crystals and helical liquids in alkaline-earth fermionic gases

The joint action of a magnetic field and of interactions is crucial for the appearance of exotic quantum phenomena, such as the quantum Hall effect. Owing to their rich nuclear structure, equivalent to an additional synthetic dimension, one-dimensional alkaline-earth(-like) fermionic gases with synthetic gauge potential and atomic contact repulsion may display similar related properties. Here w...

Anisotropic-Fermi-liquid theory of ultracold fermionic polar molecules: Landau parameters and collective modes

We study the Fermi liquid properties of the cold atomic dipolar Fermi gases with the explicit dipolar anisotropy using perturbative approaches. Due to the explicit dipolar anisotropy, Fermi surfaces exhibit distortions of the dr2−3z2 type in three dimensions and of the dx2−y2 type in two dimensions. The fermion self-energy, effective mass, and Fermi velocity develop the same anisotropy at the H...

Hydrodynamic modes in dense trapped ultracold gases.

We consider the hydrodynamic modes for dense trapped ultracold gases, where the interparticle distance is comparable to the scattering length. We show that the experimental determination of the hydrodynamic mode frequencies allows one to obtain quite directly the equation of state of a dense gas. As an example, we investigate the case of two equal fermionic populations in different hyperfine st...

Atomic Condensates Collective Phenomena in Ultracold Gases