Novel Quantum Many-Body Phenomena in Helium Nanostructures

氦纳米结构中的新型量子多体现象

• 批准号: 17071010
• 负责人: SHIRAHAMA Keiya
• 金额: $ 69.5万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-17071010/
• 关键词: 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; ボース・アインシュタイン凝縮

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.

我们在“4He纳米结构”中研究和寻找新颖的量子多体现象，其中4He被限制在各种尺寸、拓扑结构和无序的纳米多孔材料中。观察到压力引起的量子相变（QPT），它们与“局域玻色-爱因斯坦凝聚”的形成有关。在此类纳米结构系统和薄固体 4He 层中观察到固体 4He 中的超流体行为（超固体）。我们揭示了氦纳米结构是一个有趣的“超净玻色子”模型系统，它为凝聚态物理提供了“普遍性和出现性”。

项目成果

Effect of heat treatment of Nano-Porous glass on superfluidity for confined 4He

纳米多孔玻璃热处理对约束4He超流性的影响

• 发表时间: 2008
• 作者: T.Kobayashi;J.Taniguchi;M.Suzuki;K.Shirahama
• 通讯作者: K.Shirahama

Comparison of the superfluidity in nano-porous glass between anultrasound and a torsional oscillator

超声与扭转振荡器纳米多孔玻璃超流性的比较

• 发表时间: 2007
• 作者: Toshiaki Kobayashi;Junko Tardguchi;Masaru Suzuki;and Keiya Shirahama
• 通讯作者: and Keiya Shirahama

Nanoscale Bose-Einstein condensation of ^4He in porous media

^4He 在多孔介质中的纳米级玻色-爱因斯坦凝聚

• 发表时间: 2007
• 作者: K. Yamamoto;Y. Shibayama;and K. Shirahama
• 通讯作者: and K. Shirahama

Superfluid properties of ^4He confined in a regular nanoporous structure

^4He 的超流特性限制在规则的纳米多孔结构中

• 发表时间: 2007
• 作者: Y. Sogabe;T. Kondo;Y. Shibayama; and K. Shirahama
• 通讯作者: and K. Shirahama

Supersolidity in two- dimensional 4He films on graphite basal plane

石墨基面二维 4He 薄膜的超固态

• 发表时间: 2007
• 作者: Yoshiyuki Shibayama; Hiroshi Fukuyama;and Keiya Shirahama
• 通讯作者: and Keiya Shirahama