Physics of quantized vortices in superfluid helium and atomic Bose-Einstein condensates

超流氦和原子玻色-爱因斯坦凝聚体中量子化涡旋的物理学

• 批准号: 15340122
• 负责人: TSUBOTA Makoto
• 金额: $ 10.24万
• 依托单位: Osaka City 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-15340122/
• 关键词: superfluid helium; Bose-Einstein condensation; quantized vortex; quantum fluid dynamics; atomic gas; turbulence; superfluid turbulence; Kolmogorov law; ボースアインシュタイン凝縮; 中性原子気体; ボース凝縮; 渦タングル; 渦格子

We study theoretically and numerically physics of quantized vortices in superfluid helium and atomic Bose-Einstein condensates. The obtained results are the following.Superfluid helium1.We discovered an velocity-independent transition for superfluid turbulence in superfluid helium3 at ultra low temperatures.2.We found that the energy spectrum of superfluid turbulence obeys the Kolmogorov law which is the most important statistical law in classical turbulence.3.We discovered the Kelvin wave cascade process at very low temperatures that is supposed to be a dissipative mechanism.4.We found that a polarized vortex tangle appears in rotating superfluid turbulence.Atomic Bose-Einstein condensation1.We studied the structure of vortex lattices in rotating two-component Bose condensates.2.We studied three-dimensional dynamics of vortex lattice formation in rotating Bose condensates.3.We studied the mechanism of formation of multi domains in two-component Bose condensates.4.We studied collective excitations in two-component hose condensates.5.We studied spin texture in rotating two-component Bose condensates.6.We studied the ground state in rotating mixture of Bosons and Fermions.

我们从理论和数值上研究了超流氦和原子玻色-爱因斯坦凝聚体中的量子化涡旋。得到的结果如下：1.我们发现超流氦中的超流湍流在超低温下发生了与速度无关的相变.2.我们发现超流体湍流的能谱服从经典湍流中最重要的统计定律Kolmogorov定律.3.我们发现在极低温度下的Kelvin波级联过程是一种耗散机制.4.我们发现在旋转超流体湍流中出现了偏振涡旋纠缠.原子玻色-爱因斯坦凝聚.1.我们研究了旋转二分量玻色凝聚体中涡旋晶格的结构旋转玻色凝聚体中涡旋晶格的形成。3.我们研究了双组分玻色凝聚体中多磁区的形成机制。4.我们研究了双组分软管凝聚体中的集体激发。5.我们研究了旋转双组分玻色凝聚体中的自旋织构。6.我们研究了玻色子和费米子旋转混合物中的基态。

项目成果

Dynamics of quantized vortices in a rotating cylindrical vessel

旋转圆柱形容器中量子化涡流的动力学

• 发表时间: 2004
• 期刊: Journal of Low Temperature Physics 136
• 作者: M.Tsubota;A.Mitani
• 通讯作者: A.Mitani

Rotating superfluid turbulence

旋转超流体湍流

• 发表时间: 2003
• 期刊: Phys.Rev.Lett. 90
• 作者: M.Tsubota;T.Araki;C.F.Barenghi
• 通讯作者: C.F.Barenghi

Spin textures in rotating two-component Bose-Einstein condensates.

在旋转的二组分玻色-爱因斯坦凝聚态中旋转纹理。

• 发表时间: 2005
• 期刊: Phys.Rev.A 71
• 作者: K.Kasamatsu;M.Tsubota;M.Ueda
• 通讯作者: M.Ueda

Three-dimensional dynamics of vortex-lattice formation in Bose-Einstein condensates

玻色-爱因斯坦凝聚中涡晶格形成的三维动力学

• 发表时间: 2005
• 期刊: Phys.Rev.A 71
• 作者: K.Kasamatsu;M.Machida;N.Sasa;M.Tsubota
• 通讯作者: M.Tsubota

Phase separation of a fast rotating Boson-Fermion mixture in the lowest-Landau-level regime

最低朗道能级区域中快速旋转玻色子-费米子混合物的相分离

• 发表时间: 2006
• 期刊: Phys.Rev.Lett. 96
• 作者: R.Kanamoto;M.Tsubota
• 通讯作者: M.Tsubota