2009 Fiscal Year Final Research Report
Novel Quantum Many-Body Phenomena in Helium Nanostructures
| Project/Area Number |
17071010
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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 | Keio University |
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Principal Investigator |
SHIRAHAMA Keiya Keio University, 理工学部, 教授 (70251486)
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| Co-Investigator(Kenkyū-buntansha) |
SUZUKI Masaru 電気通信大学, 電気通信学部, 教授 (20196869)
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| Co-Investigator(Renkei-kenkyūsha) |
SHIBAYAMA Yoshiyuki 慶應義塾大学, 理工学部, 講師 (20327688)
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| Project Period (FY) |
2005 – 2009
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| Keywords | ヘリウム / 超流動 / 量子相転移 / ボース粒子 / 量子液体 / 量子固体 / 超流動固体 / ナノ多孔体 |
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| Research Abstract |
We studied and searched for novel quantum many-body phenomena in "4He Nanostructures", in which 4He is confined in nano-porous materials with various sizes, topological structures, and disorder. Pressure - induced quantum phase transitions (QPT) were observed, and they are related to the formation of "Localized Bose-Einstein condensates". Superfluid-like behaviors in solid 4He (supersolidity) are observed in such nanostructure systems and in thin solid 4He layer. We revealed that Helium Nanostructures are an interesting model system of "superclean Bosons", which provides "universality and emergence" in condensed matter physics.
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