2009 Fiscal Year Final Research Report
Physics of quantized vortices and "new" superfluid turbulence
| Project/Area Number |
17071008
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| Research Category |
Grant-in-Aid for Scientific Research on Priority Areas
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| Allocation Type | Single-year Grants |
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| Review Section |
Science and Engineering
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| Research Institution | Osaka City University |
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Principal Investigator |
TSUBOTA Makoto Osaka City University, 大学院・理学研究科, 教授 (10197759)
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| Co-Investigator(Kenkyū-buntansha) |
HATA Toru 大阪市立大学, 大学院・理学研究科, 教授 (10156333)
YANO Hideo 大阪市立大学, 大学院・理学研究科, 准教授 (70231652)
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| Project Period (FY) |
2005 – 2009
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| Keywords | 超流動ヘリウム / ボース・アインシュタイン凝縮 / 量子乱流 / 量子渦 / 位相欠陥 |
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| Research Abstract |
We study theoretically and experimentally quantum hydrodynamics in quantum condensed phases at low temperature, namely superfluid helium and atomic Bose-Einstein condensates (BECs). Quantum turbulence (QT) is a main topic in the studies of superfluid helium, in which the energy spectrum is shown numerically to obey the Kolmogorov law that is the most important statistical law in turbulence. The experiments using vibrating wires reveal the transition to QT free from remnant vortices, which was consistent with the numerical simulation using the vortex filament model. For atomic BECs, we study theoretically and numerically various kinds of hydrodynamic instability caused by topological defects (quantized vortices). Using two combined precessions, we show that QT can be created in this system too.
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