Dynamical properties of dipolar Fermi gases

Zero Sound in Dipolar Fermi Gases

We study the propagation of sound in a homogeneous dipolar gas at zero temperature, known as zero sound. We find that below a critical dipolar interaction, undamped sound propagation is possible only in a range of solid angles around the direction of polarization of the dipoles. For larger interaction strength, zero sound propagates in all directions, but its nature changes as a function of dir...

Strongly correlated states of ultracold rotating dipolar Fermi gases.

We study strongly correlated ground and excited states of rotating quasi-2D Fermi gases constituted of a small number of dipole-dipole interacting particles with dipole moments polarized perpendicular to the plane of motion. As the number of atoms grows, the system enters an intermediate regime, where ground states are subject to a competition between distinct bulk-edge configurations. This eff...

Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases

We study the collapse of ultracold fermionic gases into inhomogeneous states due to strong dipolar interaction in both 2D and 3D. Depending on the dimensionality, we find that two different types of inhomogeneous states are stabilized once the dipole moment reaches a critical value d > dc: the stripe phase and phase separation between high and low densities. In 2D, we prove that the stripe phas...

Wigner Crystallization in Rapidly Rotating 2D dipolar fermi gases.

We study the competition between the Wigner crystal and the Laughlin liquid states in an ultracold quasi-two-dimensional rapidly rotating polarized fermionic dipolar gas, and find that the Wigner crystal has a lower energy below a critical filling factor. We examine the quantum crystal to liquid transition for different confinements in the third direction. Our analysis of the phonon spectra of ...

Unconventional spin-density waves in dipolar Fermi gases