Volume 79, Number 4, August 2007
|Number of page(s)||6|
|Published online||19 July 2007|
Trapped Bose gases with large positive scattering length
IFA, Aarhus University - 8000 Aarhus C, Denmark
Accepted: 26 June 2007
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.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties / 03.75.Nt – Other Bose-Einstein condensation phenomena / 21.45.+v – Few-body systems
© Europhysics Letters Association, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.