Hydrodynamic excitations of trapped dipolar fermions

Abstract

A single-component Fermi gas of polarized dipolar particles in a harmonic trap can undergo a mechanical collapse due to the attractive part of the dipole-dipole interaction. This phenomenon can be conveniently manipulated by the shape of the external trapping potential. We investigate the signatures of the instability by studying the spectrum of low-lying collective excitations of the system in the hydrodynamic regime. To this end, we employ a time-dependent variational method as well as exact numerical solutions of the hydrodynamic equations of the system.

arXiv comment4 pages, 2 eps figures, final version

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Cited by in corpus (20)

• Phase space deformation of a trapped dipolar Fermi gas
• Breather mode in the many-electron dynamics of semiconductor quantum wells
• Dynamical properties of dipolar Fermi gases
• Field-linked States of Ultracold Polar Molecules
• Solitons in Tonks-Girardeau gas with dipolar interactions
• 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
• Thermodynamic properties of a dipolar Fermi gas
• Thermodynamics and coherence of a trapped dipolar Fermi gas
• Collective excitations of quasi-two-dimensional trapped dipolar fermions: transition from collisionless to hydrodynamic regime
• Monopole Oscillations and Dampings in Boson and Fermion Mixture in the Time-Dependent Gross-Pitaevskii and Vlasov Equations
• Ground-state densities of repulsive two-component Fermi gases
• Correlation energy of a homogeneous dipolar Fermi gas
• Dynamical properties of a trapped dipolar Fermi gas at finite temperature
• Coupled Breathing Oscillations of Two-Component Fermion Condensates in Deformed Traps
• Second-order interaction corrections to the Fermi surface and the quasiparticle properties of dipolar fermions in three dimensions
• Quadrupole oscillation in a dipolar Fermi gas: hydrodynamic vs collisionless regime
• Breathing oscillations and quasi-low-dimensional structures of weakly-interacting degenerate Fermi gases in highly-anisotropic traps
• Thermal-assisted Anisotropy and Thermal-driven Instability in the Superfluidity state of Two-Species Polar Fermi Gas