| 研究課題/領域番号 |
20J20715
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| 研究機関 | 東京大学 |
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研究代表者 |
YANG Hong 東京大学, 理学系研究科, 特別研究員(DC1)
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| 研究期間 (年度) |
2020-04-24 – 2023-03-31
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| キーワード | SPT states / Ultracold atoms |
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| 研究実績の概要 |
We theoretically demonstrate that interacting symmetry-protected topological (SPT) phases can be realized with ultracold spinful bosonic atoms loaded on the lattices which have a flat band at the bottom of the band structure. Ground states of such systems are not conventional Mott insulators in the sense that the ground states possess not only spin fluctuations but also non-negligible charge fluctuations. The SPT phases in such systems are determined by both spin and charge fluctuations at zero temperature. We find that the many-body ground states of such systems can be exactly obtained in some special cases, and these exact ground states turn out to serve as representative states of the SPT phases.
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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
2: おおむね順調に進展している
理由
Our paper has been published in Phys. Rev. Research 3, 023210 (2021).
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| 今後の研究の推進方策 |
Considering non-hermitian generalization of the current models.
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