Collective modes and ballistic expansion of a Fermi gas in the BCS-BEC crossover
arXiv:cond-mat/0404012 · doi:10.1103/PhysRevLett.93.190403
Abstract
We evaluate the frequencies of collective modes and the anisotropic expansion rate of a harmonically trapped Fermi superfluid at varying coupling strengths across a Feshbach resonance driving a BCS-BEC crossover. The equations of motion for the superfluid are obtained from a microscopic mean-field expression for the compressibility and are solved within a scaling ansatz. Our results confirm non-monotonic behavior in the crossover region and are in quantitative agreement with current measurements of the transverse breathing mode by Kinast {\it et al.} [Phys. Rev. Lett. {\bf 92}, 150402 (2004)] and of the axial breathing mode by Bartenstein {\it et al.} [Phys. Rev. Lett. {\bf 92}, 203201 (2004)].
4 pages and 4 figures; proof version with more extensive discussions on the comparison between theoretical results and experimental findings; to appear in Phys. Rev. Lett. (Nov. 2004)
References in corpus (20)
- Observation of resonance condensation of fermionic atom pairs
- Observation of Bose-Einstein Condensation of Molecules
- Collective excitations of a trapped Bose-condensed gas
- Experimental Study of the BEC-BCS Crossover Region in Lithium 6
- Evidence for Superfluidity in a Resonantly Interacting Fermi Gas
- Crossover from a molecular Bose-Einstein condensate to a degenerate Fermi gas
- Weakly bound dimers of fermionic atoms
- Collective excitations of a degenerate gas at the BEC-BCS crossover
- Universal Thermodynamics of Degenerate Quantum Gases in the Unitarity Limit
- Evolution of a Bose-condensed gas under variations of the confining potential
- Expansion of an interacting Fermi gas
- Collective modes of trapped gases at the BEC-BCS crossover
- Mechanical Stability of a Strongly-Interacting Fermi Gas of Atoms
- Collective oscillations of a trapped Fermi gas near a Feshbach resonance
- Low energy collective excitations in a superfluid trapped Fermi gas
- Collective excitations of a trapped degenerate Fermi gas
- Collisionless and hydrodynamic excitations of trapped boson-fermion mixtures
- Momentum distribution of a trapped Fermi gas with large scattering length
- Shrinking of a condensed fermionic cloud in a trap approaching the BEC limit
- Dynamics of Strongly Interacting Fermi Gases of Atoms in a Harmonic Trap
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- Bulk and Collective Properties of a Dilute Fermi Gas in the BCS-BEC Crossover
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- Fulde-Ferrell-Larkin-Ovchinnikov states in one-dimensional spin-polarized ultracold atomic Fermi gases
- Virial expansion for a strongly correlated Fermi system and its application to ultracold atomic Fermi gases
- Shortcuts to adiabaticity for trapped ultracold gases
- Collective oscillations of a trapped Fermi gas near the unitary limit
- Condensate Fraction of a Fermi Gas in the BCS-BEC Crossover
- Equation of state and collective frequencies of a trapped Fermi gas along the BEC-unitarity crossover
- Nonlinear Schrödinger equation for a superfluid Fermi gas from BCS to Bose crossover
- BCS-BEC crossover in an asymmetric two-component Fermi gas
- Thermodynamics of Interacting Fermions in Atomic Traps
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- Universal thermodynamics of a strongly interacting Fermi gas: theory versus experiment
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- Mean field thermodynamics of a spin-polarized spherically trapped Fermi gas at unitarity
- Sound velocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover
- Expansion of a Fermi Cloud in the BCS-BEC Crossover
- Applying BCS-BEC Crossover Theory To High Temperature Superconductors and Ultracold Atomic Fermi Gases
- Density Profiles of Strongly Interacting Trapped Fermi Gases
- Two-fluid hydrodynamic modes in a trapped superfluid gas
- Reduced quantum anomaly in a quasi-2D Fermi superfluid: The significance of the confinement-induced effective range of interactions
- Sound modes at the BCS-BEC crossover
- Condensate Fraction of a Two-Dimensional Attractive Fermi Gas
- Collective Excitations of Strongly Interacting Fermi Gases of Atoms in a Harmonic Trap
- Multi-component strongly attractive Fermi gas: a color superconductor in a one-dimensional harmonic trap
- Quantitative comparison between theoretical predictions and experimental results for Bragg spectroscopy of a strongly interacting Fermi superfluid
- Gap solitons in superfluid boson-fermion mixtures
- Validating Simple Dynamical Simulations of the Unitary Fermi Gas
- Faraday waves in elongated superfluid fermionic clouds
- Collective modes of spin-orbit coupled Fermi gases in the repulsive regime
- Collective modes of a one-dimensional trapped atomic Bose gas at finite temperatures
- Fermi-Bose mixture across a Feshbach resonance
- First and second sound modes at finite temperature in trapped Fermi gases from BCS to BEC
- Low-momentum dynamic structure factor of a strongly interacting Fermi gas at finite temperature: The Goldstone phonon and its Landau damping
- Finite temperature damping of collective modes of a BCS-BEC crossover superfluid
- BCS-BEC crossover in a trapped Fermi super-fluid using a density-functional equation
- Collective oscillations of a Fermi gas near a Feshbach resonance
- Quench dynamics of a confined ultracold Fermi gas: Direct visibility of the Goldstone mode in the single-particle excitations
- Low-momentum dynamic structure factor of a strongly interacting Fermi gas at finite temperature: A two-fluid hydrodynamic description
- Pure Goldstone mode in the quench dynamics of a confined ultracold Fermi gas in the BCS-BEC crossover regime
- BCS-BEC Crossover in Atomic Fermi Gases with a Narrow Resonance
- Collective modes of a two-dimensional Fermi gas at finite temperature
- Mean-Field vs Monte-Carlo equation of state for the expansion of a Fermi superfluid in the BCS-BEC crossover
- Hydrodynamic Modes in a Trapped Strongly Interacting Fermi Gases of Atoms
- A simple mean field equation for condensates in the BEC-BCS crossover regime
- Breathing mode frequency of a strongly interacting Fermi gas across the 2D-3D dimensional crossover
- Far-Away-From-Equilibrium Quantum Critical Conformal Dynamics: Reversibility, Thermalization, and Hydrodynamics
- A new many-body wave function for BCS-BEC crossover in Fermi gases
- Second sound with ultracold atoms: A brief historical account
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- Effective theory of excitations in a Feshbach resonant superfluid
- Dynamic structure factor of Fermi superfluid in the BEC-BCS crossover
- First and second sound of a unitary Fermi gas in highly oblate harmonic traps
- Dynamic structure factor of a strongly correlated Fermi superfluid within a density functional theory approach
- On the specific heat of a fermionic atomic cloud in the unitary regime
- Oscillatory-like Expansion of a Fermionic Superfluid
- Breathing mode frequencies of a rotating Fermi gas in the BCS-BEC crossover region
- Hydrodynamic collective modes for cold trapped gases
- Resonantly interacting -wave Fermi superfluid in two dimensions: Tan's contact and breathing mode
- First and second sound in a two-dimensional dilute Bose gas across the Berezinskii-Kosterlitz-Thouless transition
- Dynamic virial theorem at nonequilibrium and applications
- Probing an effective-range-induced super fermionic Tonks-Girardeau gas with ultracold atoms in one-dimensional harmonic traps
- Many-body theories of density response for a strongly correlated Fermi gas
- Collective mode evidence of high-spin bosonization in a trapped one-dimensional atomic Fermi gas with tunable spin
- Breathing Oscillations in Bose - Fermi Mixing Gases with Yb atoms in the Largely Prolate Deformed Traps
- Collective excitations of trapped Fermi or Bose gases
- Bogoliubov spectrum of a cigar shaped Fermi superfluid in an optical lattice at the BEC-BCS crossover
- First and second sound of a unitary Fermi gas in highly elongated harmonic traps
- Faraday Waves in strongly interacting superfluids
- Probing the critical exponent of superfluid fraction in a strongly interacting Fermi gas
- Energy Dynamics of a Nonequilibrium Unitary Fermi Gas