2022 Fiscal Year Final Research Report
Theory of Nonequilibrium Quantum Phenomena in Correlated Systems
| Project/Area Number |
19H01838
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 13030:Magnetism, superconductivity and strongly correlated systems-related
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Keywords | 非平衡 / 強相関 / 非エルミート現象 |
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| Outline of Final Research Achievements |
In this project, we have theoretically studied nonequilibrium quantum phenomena of strongly correlated systems. To this end, we have employed Floquet theory and non-Hermitian quantum theory that can describe the effects of dissipation/loss. Furthermore, based on the quantum master equation, we have explored novel quantum phases emerging in real time dynamics. Focusing on not only solid state systems but also cold atom systems and photonic systems, we have aimed at comprehensive understanding of nonequilibrium quantum phenomena of strongly correlated systems. In particular, we have obtained reasonable achievements for proposing novel phases based on Floquet theory, strengthening the theoretical foundation of non-Hermitian correlated systems, and exploring nonequilibrium phenomena in real-time dynamics.
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| Free Research Field |
物性理論
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| Academic Significance and Societal Importance of the Research Achievements |
非平衡量子系の研究が近年急速に進展しており、物性物理学のフロンティアとして基礎的で重要な課題を提出している。特に、物質に多様性と機能性をもたらす強相関系における非平衡量子現象はそのフロンティアに位置する重要なテーマであり、これに関する理論構築は、実験・理論の両側面から強く望まれる重要課題である。本研究で得られた非平衡強相関系の理論、中でもフロケ理論による新奇現象の探索、強相関の非エルミート系の理論構築、実時間ダイナミクスでの非平衡量子現象の研究は、非平衡と強相関効果の協奏により初めて生じる新奇な現象を含んでおり、物性物理の基本問題に関わる重要なものであると考えている。
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