Kinetic Theory of Collective Modes in Atomic Clouds above the Bose-Einstein Transition Temperature

U. Al Khawaja, C. J. Pethick, H. Smith

Research output: Contribution to journalArticlepeer-review

33 Citations (Scopus)

Abstract

We calculate frequencies and damping rates of the lowest collective modes of a dilute Bose gas confined in an anisotropic trapping potential above the Bose-Einstein transition temperature. From the Boltzmann equation with a simplified collision integral we derive a general dispersion relation that interpolates between the collisionless and hydrodynamic regimes. In the case of axially symmetric traps we obtain explicit expressions for the frequencies and damping rates of the lowest modes in terms of a phenomenological collision time. Our results are compared with microscopic calculations and with experiment.

Original languageEnglish
Pages (from-to)127-141
Number of pages15
JournalJournal of Low Temperature Physics
Volume118
Issue number1-2
DOIs
Publication statusPublished - 2000
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics

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