Theoretical study of nonequilibrium quantum phenpmena in cold fermions
| Project/Area Number |
16K05501
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | 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 | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2016-04-01 – 2019-03-31
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| Project Status |
Completed (Fiscal Year 2018)
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| Budget Amount *help |
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 冷却原子系 / 非平衡量子現象 / 強相関系 / 相転移 |
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| Outline of Final Research Achievements |
In this project, we have theoretically studied nonequilibrium dynamics of quantum condensed matter phases, intensive experiments for which have been conducted in recent years. Focusing on nonequilibrium dynamics in ultracold atom systems, we have explored fundamental problems in condensed matter physics, such as laser-induced many-body effects, nonequilibrium quantum phase transitions and real-time dynamics. In particular, for strongly correlated Fermi systems, we have obtained quite a few of interesting results on many-body effects/quantum phase transitions induced by periodic drives, such as noneuilibrium dynamics of a Kondo impurity and laser-induced topological superconductivity, by using sophisticated theoretical methods including Floquet theory, DMRG, exact solution, etc.
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| Academic Significance and Societal Importance of the Research Achievements |
量子凝縮相の非平衡ダイナミクスの研究は、凝縮系物理と非平衡物理が融合した境界領域に位置しており、両分野の研究フロンティアにおいて新たなプラットフォームを形成している。中でも格好の研究舞台となっている冷却原子系では、人工的に格子の形、相互作用の強さ、磁場・電場をコントロールすることができ、今までにない新奇な物理現象の実現・観測が可能である。本研究で得られた、強相関冷却フェルミ原子系における光誘起による多体効果、非平衡量子相転移、実時間ダイナミクスに関する成果は、非平衡状態になることにより初めて生じる新奇な現象を含んでおり、凝縮系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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Report
(4 results)
Research Products
(49 results)
