Validity of the shape-independent approximation for Bose-Einstein condensates

被引：71

作者：

Esry, BD ^{[1
]}

Greene, CH

机构：

[1] Harvard Smithsonian Ctr Astrophys, Inst Theoret Atom & Mol Phys, Cambridge, MA 02138 USA

[2] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[3] Univ Colorado, JILA, Boulder, CO 80309 USA

来源：

PHYSICAL REVIEW A | 1999年 / 60卷 / 02期

关键词：

D O I：

10.1103/PhysRevA.60.1451

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The validity of the shape-independent approximation is studied for three trapped atoms. By comparing the total ground-state energy calculated using pseudopotentials in the Hartree-Fock approximation to the exact ground-state energy, the shape-independent approximation is shown to agree quantitatively only in the low-density limit. It is also shown using configuration interaction that a Dirac delta function is not suitable as a replacement for the two-body interaction in exact theories. [S1050-2947(99)01208-1].

引用

页码：1451 / 1462

页数：12

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