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Excited states of a dilute Bose-Einstein condensate in a harmonic trap | | Alexander L. Fetter
; Daniel Rokhsar
; | | Date: |
28 Apr 1997 | | Subject: | Statistical Mechanics | cond-mat.stat-mech | | Affiliation: | Stanford), Daniel Rokhsar (UC, Berkeley | | Abstract: | The low-lying hydrodynamic normal modes of a dilute Bose-Einstein gas in an isotropic harmonic trap determine the corresponding Bogoliubov amplitudes. In the Thomas-Fermi limit, these modes have large low-temperature occupation numbers, and they permit an explicit construction of the dynamic structure function $S(q,omega)$. The total noncondensate number $N’(0)$ at zero temperature increases like $R^6$, where $R$ is the condensate radius measured in units of the oscillator length. The lowest dipole modes are constructed explicitly in the Bogoliubov approximation. | | Source: | arXiv, cond-mat/9704234 | | Services: | Forum | Review | PDF | Favorites | |
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