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Extension of the Thomas-Fermi approximation for trapped Bose-Einstein condensates with an arbitrary number of atoms | | A. Muñoz Mateo
; V. Delgado
; | | Date: |
29 Jan 2007 | | Journal: | Phys. Rev. A 74, 065602 (2006) | | Subject: | Other | | Abstract: | By incorporating the zero-point energy contribution we derive simple and accurate extensions of the usual Thomas-Fermi (TF) expressions for the ground-state properties of trapped Bose-Einstein condensates that remain valid for an arbitrary number of atoms in the mean-field regime. Specifically, we obtain approximate analytical expressions for the ground-state properties of spherical, cigar-shaped, and disk-shaped condensates that reduce to the correct analytical formulas in both the TF and the perturbative regimes, and remain valid and accurate in between these two limiting cases. Mean-field quasi-1D and -2D condensates appear as simple particular cases of our formulation. The validity of our results is corroborated by an independent numerical computation based on the 3D Gross-Pitaevskii equation. | | Source: | arXiv, cond-mat/0701695 | | Services: | Forum | Review | PDF | Favorites | |
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