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Collective Modes of Trapped Interacting Bosons

Gnanapragasam, Gnanasangeetha; Das, Mukunda P


The derivation for collective modes of an interacting Bose gas trapped by an isotropic harmonic oscillator potential is presented using field-theoretic method. The presence of the two-body scattering term beyond the mean-field is seen to appear inevitably in the calculations, even in the simplest approximation. As a result we see the occurrence of a small number of non-condensate atoms in the ground state density fluctuations.

CollectionsANU Research Publications
Date published: 2008
Type: Journal article
Source: International Journal of Modern Physics B
DOI: 10.1142/S0217979208050103


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