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.

理论上研究了由量子厅效应和量子点的边缘状态制成的一维电子的混合系统中的动态传输性能。已经表明，强电子 - 电子相互作用会导致量子相变，并且由于电子相干性完全抑制了那里，因此不能将常规理论应用于结果状态。电子电子相互作用对单电子注射的分流效应也已被评估。还研究了近相点和Onsager关系的当前相关性扩展到非平衡状态。

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