Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-12-21
Physics
Condensed Matter
Other Condensed Matter
7 pages, 4 figures
Scientific paper
10.1103/PhysRevA.77.032703
Neutral atoms interact through a van der Waals potential which asymptotically falls off as r^{-6}. In ultracold gases, this interaction can be described to a good approximation by the atom-atom scattering length. However, corrections arise that depend on the characteristic length of the van der Waals potential. We parameterize these corrections by analyzing the energies of two- and few-atom systems under external harmonic confinement, obtained by numerically and analytically solving the Schrodinger equation. We generalize our results to particles interacting through a longer-ranged potential which asymptotically falls off as r^{-4}.
Blume D.
Kalas Ryan M.
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