Thomas-Fermi Approximation for a Condensate with Higher-order Interactions

Details Thomas-Fermi Approximation for a Condensate with Higher-order Interactions Thomas-Fermi Approximation for a Condensate with Higher-order Interactions

2009-07-30

arxiv.org/abs/0907.5349v2

Phys. Rev. A 80 043625 (2009)

Physics

Condensed Matter

Quantum Gases

8 pages, RevTex4 format, 5 figures

Scientific paper

10.1103/PhysRevA.80.043625

We consider the ground state of a harmonically trapped Bose-Einstein condensate within the Gross-Pitaevskii theory including the effective-range corrections for a two-body zero-range potential. The resulting non-linear Schr\"odinger equation is solved analytically in the Thomas-Fermi approximation neglecting the kinetic energy term. We present results for the chemical potential and the condensate profiles, discuss boundary conditions, and compare to the usual Thomas-Fermi approach. We discuss several ways to increase the influence of effective-range corrections in experiment with magnetically tunable interactions. The level of tuning required could be inside experimental reach in the near future.

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