Theoretical and numerical studies of quantum turbulence
| Project/Area Number |
26400366
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Condensed matter physics II
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| Research Institution | Osaka City University |
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Principal Investigator |
TSUBOTA Makoto 大阪市立大学, 大学院理学研究科, 教授 (10197759)
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| Research Collaborator |
YANO Hideo
FUJIMOTO Kazuya
NAKATSUJI Ai
YUI Satoshi
IKAWA Shinichi
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 量子乱流 / 量子渦 / 超流動ヘリウム / 原子気体ボース・アインシュタイン凝縮 / 古典乱流 / coflow / ボースグラス / 対数型速度分布 / 低温物性 / ボース・アインシュタイン凝縮 |
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| Outline of Final Research Achievements |
We study analytically and numerically quantum turbulence (QT) in superfluid helium and atomic Bose-Einstein condensates (BECs). 1. Superfluid helium: 1-1. We study QT created by a vibrating sphere and find anisotropy of the vortex tangle. 1-2. We study inhomogeneous QT in thermal counterflow in a square channel. 1-3. We find logarithmic velocity profile of QT in a channel. 1-4. We study coflow where superfluid and normal fluid flow toward the same direction. This system was found to have an attractor into which vortices are attracted by mutual friction. 2. Atomic BEC: 2-1. We study spin-superflow coupled turbulence in spinor BECs. The power law of each energy spectrum is analytically obtained and confirmed numerically. 2-2. Bogoriubov wave turbulence is studied. The power laws of the correlation function are obtained from the weak wave turbulence theory, and confirmed numerically. 2-3. We find direct and inverse cascades of spin wave turbulence in spinor BEC.
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Report
(4 results)
Research Products
(25 results)
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[Presentation] 非一様量子乱流2016
Author(s)
坪田誠
Organizer
日本物理学会
Place of Presentation
東北学院大学(宮城県仙台市）
Year and Date
2016-03-19
Related Report
Invited
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