MEAN-FIELD EXPANSION IN BOSE–EINSTEIN CONDENSATES WITH FINITE-RANGE INTERACTIONS
RALF SCHÜTZHOLD, MICHAEL UHLMANN, Yan Xu +1 more
We present a formal derivation of the mean-field expansion for dilute Bose–Einstein condensates with two-particle interaction potentials which are weak and finite-range, but otherwise arbitrary. The expansion allows for a controlled investigation of the impact of microscopic interaction details (e.g. the scaling behavior) on the mean-field approach and the induced higher-order corrections beyond the s-wave scattering approximation.
arXiv:cond-mat/0505074•International Journal of Modern Physics B•Sep 30, 2006•130 citations