2009 Fiscal Year Final Research Report
Quantum properties of Bose and Fermi fluids in one-dimensional states
| Project/Area Number |
17071006
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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 | Nagoya University |
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Principal Investigator |
WADA Nobuo Nagoya University, 大学院・理学研究科, 教授 (90142687)
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| Co-Investigator(Kenkyū-buntansha) |
HIRASHIMA Dai 名古屋大学, 大学院・理学研究科, 教授 (20208820)
MATUSHITA Taku 名古屋大学, 大学院・理学研究科, 助教 (00283458)
HIEDA Mitsunori 名古屋大学, 大学院・理学研究科, 講師 (30372527)
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| Co-Investigator(Renkei-kenkyūsha) |
ミルトン コール Pennsilvania State University, Department of Physics, Professor
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| Project Period (FY) |
2005 – 2009
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| Keywords | 1次元 / ヘリウム / フェルミ流体 / 超流動 / ナノチューブ |
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| Research Abstract |
We have studied helium adsorbed in new nanopores which have regular structures from nano-cage to three-dimensionally (3D) connected pores. Adsorption potential and layer formation of the adsorbed helium are observed by the vapor pressure for the adsorption. New paradigms of zero-D and 1D helium fluids are realized in nano-cages and nano-channels, respectively. The superfluid onsets (transitions) in the 1D and 3D nanopores show obvious dependence on the pore connections. The superfluid in the 3D pores has properties similar to the Bose-Einstein condensation of the 3D Bose atomic gas. The films of the 3He gas formed in the 4He preplated nanopores show the dimensional crossover depending on the pore connection : from the 2D Boltzmann gas to a 1D or 3D gas state with decreasing temperature. This 3He-gas changes to the degenerate state in each dimension at the lower temperatures. Extremely high frequency superfluid measurements of 4He films on flat substrate determined the superfluid vortex parameters of the 4He films.
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