Mean Field Calculations of Bose-Einstein Condensation of 7Li Atoms In a Harmonic Trap

Details Mean Field Calculations of Bose-Einstein Condensation of 7Li Atoms In a Harmonic Trap Mean Field Calculations of Bose-Einstein Condensation of 7Li Atoms In a Harmonic Trap

1996-04-11

arxiv.org/abs/cond-mat/9604075v1

Physics

Condensed Matter

11 pages + 4 figures

Scientific paper

10.1103/PhysRevA.55.3658

A self-consistent mean-field theory for bosons for T>0 is used to reconcile predictions of collapse with recent observations of Bose-Einstein condensation of 7Li. Eigenfunctions of a (non-separable) Hamiltonian that includes the anisotropic external trap field and atom-atom interactions are obtained by an iteration process. A sum over the Bose distribution, and the ``alternating direction implicit'' algorithm are used. Near Tc, the ensemble exhibits a localized condensate composed of atoms in the few lowest states. For lower T, numerical instability indicates collapse to a more dense phase.

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