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28 March 2024
 
  » arxiv » cond-mat/9712122

 Article overview


Excitation spectrum in a cylindrical Bose-Einstein gas
Tomoya Isoshima ; Kazushige Machida ;
Date 11 Dec 1997
Journal J. Phys. Soc. Jpn. 67, 1840 (1998).
Subject cond-mat
AbstractWhole excitation spectrum is calculated within the Popov approximation of the Bogoliubov theory for a cylindrical symmetric Bose-Einstein gas trapped radially by a harmonic potential. The full dispersion relation and its temperature dependence of the zero sound mode propagating along the axial direction are evaluated in a self-consistent manner. The sound velocity is shown to depend not only on the peak density, but also on the axial area density. Recent sound velocity experiment on Na atom gas is discussed in light of the present theory.
Source arXiv, cond-mat/9712122
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