COLLECTIVE MODES OF TRAPPED INTERACTING BOSONS
G. GNANAPRAGASAM, Mrinmay Das
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.
International Journal of Modern Physics B•Oct 20, 2008•0 citations