Dynamical properties of dipolar Fermi gases

Abstract

We investigate dynamical properties of a one-component Fermi gas with dipole-dipole interaction between particles. Using a variational function based on the Thomas-Fermi density distribution in phase space representation, the total energy is described by a function of deformation parameters in both real and momentum space. Various thermodynamic quantities of a uniform dipolar Fermi gas are derived, and then instability of this system is discussed. For a trapped dipolar Fermi gas, the collective oscillation frequencies are derived with the energy-weighted sum rule method. The frequencies for the monopole and quadrupole modes are calculated, and softening against collapse is shown as the dipolar strength approaches the critical value. Finally, we investigate the effects of the dipolar interaction on the expansion dynamics of the Fermi gas and show how the dipolar effects manifest in an expanded cloud.

14 pages, 8 figures, submitted to New J. Phys

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• Hydrodynamic excitations of trapped dipolar fermions
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Cited by in corpus (55)

• Cold and Ultracold Molecules: Science, Technology, and Applications
• Condensed Matter Theory of Dipolar Quantum Gases
• Dipolar physics: A review of experiments with magnetic quantum gases
• Observation of Fermi surface deformation in a dipolar quantum gas
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• Biaxial nematic phases in ultracold dipolar Fermi gases
• Ferro-Nematic ground state of the dilute dipolar Fermi gas
• Anisotropic Fermi liquid theory of the ultra cold fermionic polar molecules: Landau parameters and collective modes
• Spontaneous inhomogeneous phases in ultracold dipolar Fermi gases
• Zero Sound in Dipolar Fermi Gases
• Mixed triplet and singlet pairing in multicomponent ultracold fermion systems with dipolar interactions
• Hartree-Fock-Bogoliubov Theory of Dipolar Fermi Gases
• Supersolid Phase of Cold Fermionic Polar Molecules in 2D Optical Lattices
• Fermi surface of a trapped dipolar Fermi gas
• Dipolar Fermi gases in anisotropic traps
• Collective Motion of Polarized Dipolar Fermi Gases in the Hydrodynamic Regime
• Symmetry breaking in dipolar matter-wave solitons in dual-core couplers
• The J-triplet Cooper pairing with magnetic dipolar interactions
• Thermodynamic properties of a dipolar Fermi gas
• Compressibility, zero sound, and effective mass of a fermionic dipolar gas at finite temperature
• Thermodynamics and coherence of a trapped dipolar Fermi gas
• Collective excitations of quasi-two-dimensional trapped dipolar fermions: transition from collisionless to hydrodynamic regime
• Spin-orbit coupled Fermi liquid theory of ultra-cold magnetic dipolar fermions
• Unconventional magnetism in imbalanced Fermi systems with magnetic dipolar interactions
• Ultra-cold Fermi gases with resonant dipole-dipole interaction
• Properties of the density-wave phase of a two-dimensional dipolar Fermi gas
• Anisotropic sub-Doppler laser cooling in dysprosium magneto-optical traps
• Collective phenomena in quasi-two-dimensional fermionic polar molecules: band renormalization and excitons
• Antiferrosmectic ground state of two-component dipolar Fermi gases -- an analog of meson condensation in nuclear matter
• Magnetostriction and exchange effects in trapped dipolar Bose and Fermi gases
• Equilibrium Properties of a Trapped Dipolar Fermion at Finite Temperatures
• Anisotropic Superfluidity in the Two-Species Polar Fermi Gas
• Correlation energy of a homogeneous dipolar Fermi gas
• Singlet and Triplet Superfluid Competition in a Mixture of Two-Component Fermi and One-Component Dipolar Bose Gases
• The ground state of polaron in an ultracold dipolar Fermi gas
• Dynamical properties of a trapped dipolar Fermi gas at finite temperature
• Quantum phases of a one-dimensional dipolar Fermi gas
• Dipolar Drag in Bilayer Harmonically Trapped Gases
• Unconventional symmetries of Fermi liquid and Cooper pairing properties with electric and magnetic dipolar fermions
• Reentrant Superfluidity and Pair Density Wave in Single Component Dipolar Fermi Gases
• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Ground state of an ultracold Fermi gas of tilted dipoles in elongated traps
• Stability and collapse of fermions in a binary dipolar boson-fermion 164Dy-161Dy mixture
• Time-of-flight expansion of trapped dipolar Fermi gases: From the collisionless to the hydrodynamic regime
• Collective excitations of a harmonically trapped, two-dimensional, spin-polarized dipolar Fermi gas in the hydrodynamic regime
• Quadrupole oscillation in a dipolar Fermi gas: hydrodynamic vs collisionless regime
• A local exchange theory for trapped dipolar gases
• Stability of trapped degenerate dipolar Bose and Fermi gases
• Dipolar fermions in a multilayer geometry
• Superfluid pairing in a mixture of a spin-polarized Fermi gas and a dipolar condensate
• Stability of quantum degenerate Fermi gases of tilted polar molecules
• Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions
• Study of a degenerate dipolar Fermi gas of 161Dy atoms
• Free Expansion of a Weakly-interacting Dipolar Fermi Gas
• Thermal-assisted Anisotropy and Thermal-driven Instability in the Superfluidity state of Two-Species Polar Fermi Gas