Collective Excitations of Strongly Interacting Fermi Gases of Atoms in a Harmonic Trap

Details Collective Excitations of Strongly Interacting Fermi Gases of Atoms in a Harmonic Trap Collective Excitations of Strongly Interacting Fermi Gases of Atoms in a Harmonic Trap

2005-02-28

arxiv.org/abs/cond-mat/0502651v4

Phys. Rev. A 72, 011603(R) (2005)

Physics

Condensed Matter

Other Condensed Matter

11 pages, 2 figures

Scientific paper

10.1103/PhysRevA.72.011603

The zero-temperature properties of a dilute two-component Fermi gas in the BCS-BEC crossover are investigated. On the basis of a generalization of the Hylleraas-Undheim method, we construct rigorous upper bounds to the collective frequencies for the radial and the axial breathing mode of the Fermi gas under harmonic confinement in the framework of the hydrodynamic theory. The bounds are compared to experimental data for trapped vapors of Li6 atoms.

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