Path-integral Monte Carlo study of dynamic response in mesoscopic devices

介观器件动态响应的路径积分蒙特卡罗研究

• 批准号: 21740220
• 负责人: KATO Takeo
• 金额: $ 2.91万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21740220/
• 关键词: 物性理論; メゾスコピック系; 量子ドット; 量子コンピュータ; 量子細線

Dynamic transport properties in hybrid systems with one-dimensional electrons made by edge states of quantum Hall effect and a quantum dot have been studied theoretically. It has been shown that strong electron-electron interaction causes quantum phase transition and that conventional theory cannot be applied to the resultant state as electron coherence is completely suppressed there. Decoherence effect of electron-electron interaction on single electron injection has also been evaluated. Current correlations in Kondo dots and Onsager's relations extended to non-equilibrium states have also been studied.

从理论上研究了由量子霍尔效应的边态和量子点形成的一维电子混合系统的动态输运特性。结果表明，强的电子-电子相互作用会引起量子相变，而传统的理论不能应用于生成态，因为电子的相干性被完全抑制。还对电子-电子相互作用对单电子注入的退相干效应进行了评价。还研究了Kondo点和Onsager关系中扩展到非平衡态的当前关联。

项目成果

Numerical study of the Coulomb blockade in an open quantum dot

开放量子点库仑封锁的数值研究

• 发表时间: 2009
• 期刊: Proceeding of the 9^<th> International Symposium on Foundation of Quantum Mechanics in the Light of New Technology-ISQM-TOKYO'08
• 作者: Yuji Hamamoto;Takeo Kato
• 通讯作者: Takeo Kato