2020 Fiscal Year Annual Research Report
Topological and Many-body Localization Phases in Spinor Bose-Hubbard Models
| Project/Area Number |
20J20715
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| Research Institution | The University of Tokyo |
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Principal Investigator |
YANG Hong 東京大学, 理学系研究科, 特別研究員(DC1)
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| Project Period (FY) |
2020-04-24 – 2023-03-31
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| Keywords | SPT states / Ultracold atoms |
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| Outline of Annual Research Achievements |
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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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
Our paper has been published in Phys. Rev. Research 3, 023210 (2021).
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| Strategy for Future Research Activity |
Considering non-hermitian generalization of the current models.
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Research Products
(3 results)
