Spontaneous magnetic ordering in a ferromagnetic spinor dipolar Bose-Einstein condensate

被引：33

作者：

Kawaguchi, Yuki ^{[1
]}

Saito, Hiroki ^{[2
]}

Kudo, Kazue ^{[3
]}

Ueda, Masahito ^{[1
,4
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

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

[3] Ochanomizu Univ, Ochadai Acad Prod, Bunkyo Ku, Tokyo 1128610, Japan

[4] ERATO, Macroscop Quantum Control Project, Bunkyo Ku, Tokyo 1138656, Japan

来源：

PHYSICAL REVIEW A | 2010年 / 82卷 / 04期

关键词：

D O I：

10.1103/PhysRevA.82.043627

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the spin dynamics of a spin-1 ferromagnetic Bose-Einstein condensate with magnetic dipole-dipole interaction (MDDI) based on the Gross-Pitaevskii and Bogoliubov theories. We find that various magnetic structures such as checkerboards and stripes emerge in the course of the dynamics due to the combined effects of spin-exchange interaction, MDDI, quadratic Zeeman and finite-size effects, and nonstationary initial conditions. However, the short-range magnetic order observed by the Berkeley group [Phys. Rev. Lett. 100, 170403 (2008)] is not fully reproduced in our calculations; the periodicity of the order differs by a factor of 3 and the checkerboard pattern eventually dissolves in the course of time. Possible reasons for the discrepancy are discussed.

引用

页数：17

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