Development of numerical methods for nonequilibrium many-body states in quantum dot systems
| Project/Area Number |
24540316
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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 |
Condensed matter physics I
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| Research Institution | The University of Tokyo |
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Principal Investigator |
KATO Takeo 東京大学, 物性研究所, 准教授 (80332956)
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| Co-Investigator(Kenkyū-buntansha) |
SAKANO Rui 東京大学, 物性研究所, 助教 (00625022)
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | メゾスコピック系・局在 / 近藤効果 / 量子コヒーレンス / 非平衡統計力学 / スピントロニクス / メゾスコピック系 / 物性理論 / 量子ドット / 半導体 / 非平衡輸送特性 / 電子相関 |
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| Outline of Final Research Achievements |
We discussed time-dependent transport and effect of vertex corrections in quantum dot systems, which are described by an impurity Anderson model. This calculation provides a starting point of theoretical approach to understand photon-assisted transport in interacting electron systems, and gives a foundation for higher-order conserving approximations. We also studied dephasing phenomena in single-electron and single-photon generation, heat transport via a local two-state systems, and relation between spin diffusion length and spin localization length theoretically. Sakano Rui, who is a member of this project, studied multi-orbital Anderson models theoretically in the limit of high bias as well as in the low-temperature Fermi-liquid region.
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Report
(4 results)
Research Products
(47 results)
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[Presentation] カーボンナノチューブ量子ドットにおけるショットノイズ測定2015
Author(s)
藤原亮, 秦徳郎, 吉井涼輔, 荒川智紀, 小林研介, Meydi Ferrier, Raphaelle Dalagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会第７０回年次大会
Place of Presentation
早稲田大学（東京都新宿区）
Year and Date
2015-03-22
Related Report
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[Presentation] SU(2)およびSU(4)近藤効果のスケーリングに関する実験的研究2014
Author(s)
Meydi Ferrier, 荒川智紀, 秦徳郎, 藤原亮, 小林研介, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会2014年秋季大会
Place of Presentation
中部大学（愛知県春日井市）
Year and Date
2014-09-08
Related Report
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[Presentation] SU(2)およびSU(4)近藤状態における非平衡電流ゆらぎ2014
Author(s)
荒川智紀, 秦徳郎, 藤原亮, 小林研介, Meydi Ferrier, Raphaelle Delagrange, Richard Deblock, Helene Bouchiat, 阪野塁, 小栗章
Organizer
日本物理学会2014年秋季大会
Place of Presentation
中部大学（愛知県春日井市）
Year and Date
2014-09-08
Related Report
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