6,224 research outputs found
Pair-correlation properties and momentum distribution of finite number of interacting trapped bosons in three dimension
We study the ground state pair-correlation properties of a weakly interacting
trapped Bose gas in three dimension by using a correlated many-body method. Use
of the van der Waals interaction potential and an external trapping potential
shows realistic features. We also test the validity of shape-independent
approximation in the calculation of correlation properties.Comment: Accepted for publication in The Journal of Chemical Physic
Stability of attractive bosonic cloud with van der Waals interaction
We investigate the structure and stability of Bose-Einstein condensate of
Li atoms with realistic van der Waals interaction by using the potential
harmonic expansion method. Besides the known low-density metastable solution
with contact delta function interaction, we find a stable branch at a higher
density which corresponds to the formation of an atomic cluster. Comparison
with the results of non-local effective interaction is also presented. We
analyze the effect of trap size on the transition between the two branches of
solutions. We also compute the loss rate of a Bose condensate due to two- and
three-body collisions.Comment: 9 pages, 5 figure
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