Coherent spin-mixing dynamics in thermal 87Rb spin-1 and spin-2 gases

被引：12

作者：

He, Xiaodong ^{[1
]}

Zhu, Bing ^{[1
]}

Li, Xiaoke ^{[1
]}

Wang, Fudong ^{[1
]}

Xu, Zhi-Fang ^{[2
]}

Wang, Dajun ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

[2] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA

来源：

PHYSICAL REVIEW A | 2015年 / 91卷 / 03期

关键词：

Statistical mechanics - Distribution functions - Spin dynamics - Mixing - Bose-Einstein condensation - Equations of motion;

D O I：

10.1103/PhysRevA.91.033635

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We study the nonequilibrium coherent spin-mixing dynamics in ferromagnetic spin-1 and antiferromagnetic spin-2 thermal gases of ultracold Rb-87 atoms. Long-lasting spin population oscillations with magnetic-field-dependent resonances are observed in both cases. Our observations are well reproduced by Boltzmann equations of the Wigner distribution function. Compared to the equation of motion of spinor Bose-Einstein condensates, the only difference here is a factor-of-2 increase in the spin-dependent interaction, which is confirmed directly in the spin-2 case by measuring the relation between the oscillation amplitude and the sample's density.

引用

页数：6

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