Collective Excitations of a Dipolar Bose-Einstein Condensate

被引：54

作者：

Bismut, G. ^{[1
]}

Pasquiou, B. ^{[1
]}

Marechal, E. ^{[1
]}

Pedri, P. ^{[1
]}

Vernac, L. ^{[1
]}

Gorceix, O. ^{[1
]}

Laburthe-Tolra, B. ^{[1
]}

机构：

[1] Univ Paris 13, Phys Lasers Lab, CNRS, UMR 7538, F-93430 Villetaneuse, France

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 04期

关键词：

GAS; DYNAMICS; ATOMS; TRAP;

D O I：

10.1103/PhysRevLett.105.040404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the effect of dipole-dipole interactions on the frequency of a collective mode of a Bose-Einstein condensate. At relatively large numbers of atoms, the experimental measurements are in good agreement with zero temperature theoretical predictions based on the Thomas-Fermi approach. Experimental results obtained for the dipolar shift of a collective mode show a larger dependency to both the trap geometry and the atom number than the ones obtained when measuring the modification of the condensate aspect ratio due to dipolar forces. These findings are in good agreement with simulations based on a Gaussian ansatz.

引用

页数：4

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