Hydrodynamic equation of a spinor dipolar Bose-Einstein condensate
Hydrodynamic equation of a spinor dipolar Bose-Einstein condensate
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DOI：
10.1103/physreva.82.053614
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发表时间：
2010-09
影响因子：
2.9
通讯作者：
K. Kudo;Y. Kawaguchi
中科院分区：
文献类型：
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作者：
K. Kudo;Y. Kawaguchi
我们介绍了具有磁偶极-偶极相互作用的铁磁玻色-爱因斯坦凝聚体中的自旋动力学运动方程，它是用一个表示超流速度的矢量和一个描述磁化强度的复标量写成的。这种简单的流体动力学描述提取了自旋波的动力学，并提供了一种研究凝聚体自旋动力学的直接方法。为了证明这种描述的优点，我们用解析的形式说明了动力学不稳定性和磁涨落偏好。
We introduce equations of motion for spin dynamics in a ferromagnetic Bose-Einstein condensate with magnetic dipole-dipole interaction, written using a vector expressing the superfluid velocity and a complex scalar describing the magnetization. This simple hydrodynamical description extracts the dynamics of spin wave and affords a straightforward approach by which to investigate the spin dynamics of the condensate. To demonstrate the advantages of the description, we illustrate dynamical instability and magnetic fluctuation preference, which are expressed in analytical forms.