Theoretical studies of quantum vortices in Bose-Einstein condensates

玻色-爱因斯坦凝聚体中量子涡旋的理论研究

• 批准号: 15340121
• 负责人: MACHIDA K.
• 金额: $ 9.02万
• 依托单位: Okayama University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15340121/
• 关键词: Neutral Fermi atoms; Fesh bachresonena; BCS superfluid; Bogolivbov-de Gennes; Fulde-Ferrell; 量子渦; ボーズ・アインシュタイン凝縮; スピナー凝縮; マーミン・ホー渦; ケルビン波; ツカチェンコ波; 渦格子

Several experimental groups have succeeded in achieving BCS superfluids of neutral atom gases, suchas ^6Li and ^<40>K by utilizing Feshbach resonance. We investigate these superfluids when up spin atom and a own spin atom numbers are unequal by solving Bogoliubov-de Gennes equation under realistic situations. We have found that at zero temperature the ground state can be described by Fulde-Ferrell-Larkin-Ovchinnikov state where the order parameter changes its sign spatially, we constructed a phafe diagram in the plase of number imbalance and temperature.

几个实验小组已经成功地利用Feshbach共振实现了中性原子气体的BCS超流体，如^6Li和^<40>K。通过求解Bogoliubov-de Gennes方程，在实际情况下研究了上自旋原子数和自自旋原子数不相等时的超流体。我们发现在零温度下基态可以用Fulde-Ferrell-Larkin-Ovchinnikov态描述，其中序参量在空间上变号，我们构造了一个数不平衡态和温度的相位图。

项目成果

Sound volocity and multibranch Bogoliubov spectrum of an elongated Fermi superfluid in the BEC-BCS crossover

BEC-BCS 交叉中细长费米超流体的声波和多分支 Bogoliubov 谱

• 发表时间: 2006
• 期刊: Phys. Rev. A 73
• 作者: T.K.Ghosh;K.Machida
• 通讯作者: K.Machida

Collective modes of a Fermi superfluid containing vortices along the BEC-BCS crossover

• DOI: 10.1103/physreva.73.025601
• 发表时间: 2005-10
• 期刊: Physical Review A
• 影响因子: 2.9
• 作者: T. Ghosh;K. Machida

Direct imaging of spatially modulated superfluid phases in atomic fermion systems.

• DOI: 10.1103/physrevlett.94.060404
• 发表时间: 2004-09
• 期刊: Physical review letters
• 影响因子: 8.6
• 作者: T. Mizushima;K. Machida;M. Ichioka

Topological structure of a vortex in the Fulde-Ferrell-Larkin-Ovchinnikov state

• DOI: 10.1103/physrevlett.95.117003
• 发表时间: 2005-09-09
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Mizushima, T;Machida, K;Ichioka, M
• 通讯作者: Ichioka, M

Topological structure of a vortex in the Fulde-Ferrell-Larkin-Orchinnikov state

Fulde-Ferrell-Larkin-Orchinnikov 态涡旋的拓扑结构

• 发表时间: 2005
• 期刊: Phys. Rev. Lett. 95
• 作者: T.Mizushima;et al.
• 通讯作者: et al.