Stability of a fully magnetized ferromagnetic state in repulsively interacting ultracold Fermi gases
文献类型：期刊论文
| 作者 | Cui, XL ; Zhai, H |
| 刊名 | PHYSICAL REVIEW A
 |
| 出版日期 | 2010 |
| 卷号 | 81期号:4 |
| 关键词 | U=INFINITY HUBBARD-MODEL MANY-BODY PROBLEM GROUND-STATES LINE GRAPHS S-BAND LATTICE METALS NARROW SPIN |
| ISSN号 | 1050-2947 |
| 通讯作者 | Cui, XL (reprint author), Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | We construct a variational wave function to study whether a fully polarized Fermi sea of ultracold atoms is energetically stable against a single spin flip. Our variational wave function contains short-range correlations at least to the same level as Gutzwiller's projected wave function. For the Hubbard lattice model and the continuum model with pure repulsive interaction, we show that a fully polarized Fermi sea is generally unstable even for infinite repulsive strength. By contrast, for a resonance model, the ferromagnetic state is possible if the s-wave scattering length is positive and sufficiently large and the system is prepared to be orthogonal to the molecular bound state. However, we cannot rule out the possibility that more exotic correlations can destabilize the ferromagnetic state. |
| 收录类别 | SCI |
| 资助信息 | Basic Research Young Scholars Program of Tsinghua University; NSFC [10944002, 10847002]; MOST |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53014]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Cui, XL,Zhai, H. Stability of a fully magnetized ferromagnetic state in repulsively interacting ultracold Fermi gases[J]. PHYSICAL REVIEW A,2010,81(4). |
| APA | Cui, XL,&Zhai, H.(2010).Stability of a fully magnetized ferromagnetic state in repulsively interacting ultracold Fermi gases.PHYSICAL REVIEW A,81(4). |
| MLA | Cui, XL,et al."Stability of a fully magnetized ferromagnetic state in repulsively interacting ultracold Fermi gases".PHYSICAL REVIEW A 81.4(2010). |
入库方式： OAI收割
来源：物理研究所
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