| Project/Area Number |
25287104
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Atomic/Molecular/Quantum electronics
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| Research Institution | NTT Basic Research Laboratories |
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Principal Investigator |
Yamashita Makoto 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 主任研究員 (00393786)
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| Co-Investigator(Kenkyū-buntansha) |
MUKAI Tetsuya 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 主任研究員 (70393775)
INABA Kensuke 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 研究主任 (10564990)
IMAI Hiromitsu 日本電信電話株式会社NTT物性科学基礎研究所, 量子光物性研究部, 研究員 (00649551)
SUGA Sei-ichiro 兵庫県立大学, 大学院工学研究科, 教授 (40206389)
SUZUKI Takafumi 兵庫県立大学, 大学院工学研究科, 准教授 (40444096)
TSUCHIURA Hiroki 東北大学, 大学院工学研究科, 准教授 (30374961)
TOGA Yuta 国立研究開発法人物質・材料研究機構, 元素戦略磁性材料研究拠点, 研究員 (70641231)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2015: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2014: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2013: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
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| Keywords | 冷却原子気体 / 光格子 / 量子物性 / スピン / 超流動 / アトムチップ / 超伝導 / 擬一次元 / 多成分 |
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| Outline of Final Research Achievements |
We explore the novel quantum phases in ultracold atomic gases with the spin degrees of freedom, forming the typical many-body multi-component systems in optical lattices. We have theoretically clarified that Cooper-pairing symmetry of a fermionic superfluid and the dynamical instability of a bosonic superfluid greatly change via the subtle balance in the interactions between the atomic components. We consider such a role of interactions to be a possible origin of diverse quantum phases found in these multi-component systems. On the other hand, we have experimentally created quasi-one-dimensional Bose-Einstein condensates with high density on a persistent-supercurrent atom chip. We observe that the momentum distribution of condensates becomes fragile owing to the quantum fluctuations inherent in this low-dimensional system. We furthermore develop the experimental techniques for controlling atomic spins on an atom chip and then realize the multi-component condensates.
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