Observation of Dipole-Induced Spin Texture in an 87Rb Bose-Einstein Condensate

被引：47

作者：

Eto, Yujiro ^{[1
]}

Saito, Hiroki ^{[2
]}

Hirano, Takuya ^{[1
]}

机构：

[1] Gakushuin Univ, Dept Phys, Toshima Ku, Tokyo 1718588, Japan

[2] Univ Electrocommun, Dept Engn Sci, Chofu, Tokyo 1828585, Japan

来源：

PHYSICAL REVIEW LETTERS | 2014年 / 112卷 / 18期

基金：

日本学术振兴会;

关键词：

Bose-Einstein condensation - Electric dipole moments - Statistical mechanics - Alkali metals - Dipole moment;

D O I：

10.1103/PhysRevLett.112.185301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the formation of spin texture resulting from the magnetic dipole-dipole interaction in a spin-2 Rb-87 Bose-Einstein condensate. The spinor condensate is prepared in the transversely polarized spin state and the time evolution is observed under a magnetic field of 90 mG with a gradient of 3 mG/cm using Stern-Gerlach imaging. The experimental results are compared with numerical simulations of the Gross-Pitaevskii equation, which reveals that the observed spatial modulation of the longitudinal magnetization is due to the spin precession in an effective magnetic field produced by the dipole-dipole interaction. These results show that the dipole-dipole interaction has considerable effects even on spinor condensates of alkali metal atoms.

引用

页数：5

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