Low energy collective excitations in a superfluid trapped Fermi gas

Abstract

We study low energy collective excitations in a trapped superfluid Fermi gas, that describe slow variations of the phase of the superfluid order parameter. Well below the critical temperature the corresponding eigenfrequencies turn out to be of the order of the trap frequency, and these modes manifest themselves as the eigenmodes of the density fluctuations of the gas sample. The latter could provide an experimental evidence of the presence of the superfluid phase.

5 pages, REVTeX, referencies corrected

References in corpus (16)

• Theory of Bose-Einstein condensation in trapped gases
• Observation of p-wave Threshold Law Using Evaporatively Cooled Fermionic Atoms
• BCS Theory for Trapped Ultracold Fermions
• Damping of low-energy excitations of a trapped Bose condensate at finite temperatures
• Evaporative Cooling of a Two-Component Degenerate Fermi Gas
• Collective oscillations of an interacting trapped Fermi gas
• Prospects for p-wave paired BCS states of fermionic atoms
• Exploring a quantum degenerate gas of fermionic atoms
• Hydrodynamic Excitations of Trapped Fermi Gases
• Interacting Fermi gas in a Harmonic Trap
• Optical linewidth of a low density Fermi-Dirac gas
• Critical temperature and Ginzburg-Landau equation for a trapped Fermi gas
• Inhibition of spontaneous emission in Fermi gases
• Collisional relaxation in a fermionic gas
• Optical detection of a BCS transition of Lithium-6 in harmonic traps
• Single-particle excitations and the order parameter for a trapped superfluid Fermi gas

Cited by in corpus (50)

• Collective excitations of a degenerate gas at the BEC-BCS crossover
• General coordinate invariance and conformal invariance in nonrelativistic physics: Unitary Fermi gas
• The BCS-BEC crossover: From ultra-cold Fermi gases to nuclear systems
• Superfluidity and collective modes in a uniform gas of Fermi atoms with a Feshbach resonance
• Collective modes of trapped gases at the BEC-BCS crossover
• Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover
• Viscous relaxation and collective oscillations in a trapped Fermi gas near the unitarity limit
• Collective oscillations of a trapped Fermi gas near the unitary limit
• Pairing in a two-component ultracold Fermi gas: phases with broken space symmetries
• Signatures of resonance superfluidity in a quantum Fermi gas
• Low energy Collective Modes of a Superfluid Trapped atomic Fermi Gas
• Transition from Collisionless to Hydrodynamic Behaviour in an Ultracold Atomic Gas
• Fermi Gases in Slowly Rotating Traps: Superfluid vs Collisional Hydrodynamics
• Moment of Inertia and Quadrupole Response Function of a Trapped Superfluid
• Spin Excitations in a Fermi Gas of Atoms
• Laser probing of Cooper-paired trapped atoms
• Scissors mode in a superfluid Fermi gas
• Collective oscillations of a trapped quantum gas in low dimensions
• Shell structure and pairing for interacting fermions in a trap
• Pairing of fermions in atomic traps and nuclei
• Pairing collectivity in medium-mass neutron-rich nuclei near drip-line
• Phase diagram, extended domain walls, and soft collective modes in a three component fermionic superfluid
• Vortices in superfluid trapped Fermi gases at zero temperature
• Josephson effect in superfluid atomic Fermi-gases
• Vortex line in a neutral finite-temperature superfluid Fermi gas
• Temperature and finite-size effects in collective modes of superfluid Fermi gases
• Collective excitations of a trapped Fermi gas at finite temperature
• Low energy monopole Modes of a Trapped atomic Fermi Gas
• Vortices in Trapped Superfluid Fermi-gases
• Slow rotation of a superfluid trapped Fermi gas
• Quench dynamics of a confined ultracold Fermi gas: Direct visibility of the Goldstone mode in the single-particle excitations
• Pure Goldstone mode in the quench dynamics of a confined ultracold Fermi gas in the BCS-BEC crossover regime
• Coupling of hydrodynamics and quasiparticle motion in collective modes of superfluid trapped Fermi gases
• Ground state fluctuations in finite Fermi and Bose systems
• Effects of the trapping potential on a superfluid atomic Fermi Gas
• Operator spectrum of nonrelativistic CFTs at large charge
• Laser-induced collective excitations in a two-component Fermi gas
• Quasiparticle spectrum and dynamical stability of an atomic Bose-Einstein condensate coupled to a degenerate Fermi gas
• Density response of a trapped Fermi gas: a crossover from the pair vibration mode to the Goldstone mode
• On the specific heat of a fermionic atomic cloud in the unitary regime
• Analytic normal mode frequencies for N identical particles: The microscopic dynamics underlying the emergence and stability of excitation gaps from BCS to unitarity
• Dynamic virial theorem at nonequilibrium and applications
• Cooper-pair coherence in a superfluid Fermi-gas of atoms
• Signatures of macroscopic quantum coherence in ultracold dilute Fermi gases
• Three comments on the Fermi gas at unitarity in a harmonic trap
• Twocomponent Fermi vapour in a 2D rotating trap
• Finite dimensional global and exponential attractors for a coupled time-dependent Ginzburg-Landau equations for atomic Fermi gases near the BCS-BEC crossover
• Microscopic description of the twist mode in normal and superfluid trapped Fermi gases
• Collective excitations in a fermion-fermion mixture with different Fermi surfaces
• Quantitative Probe of Pairing Correlations in a Cold Fermionic Atom Gas