Advertisement

Collective excitations of a degenerate Fermi vapour in a magnetic trap

  • M. Amoruso
  • I. Meccoli
  • A. Minguzzi
  • M.P. Tosi

Abstract:

We evaluate the small-amplitude excitations of a spin-polarized vapour of Fermi atoms confined inside a harmonic trap. The dispersion law \(\) is obtained for the vapour in the collisional regime inside a spherical trap of frequency \(\), with n the number of radial nodes and \(\) the orbital angular momentum. The low-energy excitations are also treated in the case of an axially symmetric harmonic confinement. The collisionless regime is discussed with main reference to a Landau-Boltzmann equation for the Wigner distribution function: this equation is solved within a variational approach allowing an account of non-linearities. A comparative discussion of the eigenmodes of oscillation for confined Fermi and Bose vapours is presented in an Appendix.

PACS. 67.40.Db Quantum statistical theory; ground state, elementary excitations 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 1999

Authors and Affiliations

  • M. Amoruso
    • 1
  • I. Meccoli
    • 1
  • A. Minguzzi
    • 1
  • M.P. Tosi
    • 1
  1. 1.Istituto Nazionale di Fisica della Materia and Classe di Scienze, Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, ItalyIT

Personalised recommendations