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2014 Fiscal Year Final Research Report

Development of numerical methods for nonequilibrium many-body states in quantum dot systems

Research Project

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Project/Area Number 24540316
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Condensed matter physics I
Research InstitutionThe University of Tokyo

Principal Investigator

KATO Takeo  東京大学, 物性研究所, 准教授 (80332956)

Co-Investigator(Kenkyū-buntansha) SAKANO Rui  東京大学, 物性研究所, 助教 (00625022)
Project Period (FY) 2012-04-01 – 2015-03-31
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
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.

Free Research Field

物性理論

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Published: 2016-06-03  

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