Trapped Bose gases with large positive scattering length
arXiv:0706.3300 · doi:10.1209/0295-5075/79/40002
Abstract
We calculate the energy and the condensate fraction of a system of trapped bosons interacting via a short-range two-body potential with positive scattering length. The potential is attractive and has a two-body bound state. When the scattering length is small compared to the trap length the system is model independent: all potential models -- attractive, repulsive and zero-range -- provide similar results. When the scattering length is large the attractive model differs qualitatively from the repulsive and zero-range models. In this regime the system with attractive potential becomes independent of the scattering length, with both the energy and the condensate fraction converging towards finite constants.
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- Trapped two-component Fermi gases with up to six particles: Energetics, structural properties, and molecular condensate fraction
- Universal Two-Body Spectra of Ultracold Harmonically Trapped Atoms in Two and Three Dimensions
- Hyperspherical approach to dipolar Bose-Einstein condensates beyond the mean-field limit