Manipulation of internal blockage in triangular triple quantum dot

作     者：齐月 魏建华 Yue Qi;Jian-Hua Wei

作者机构：Department of PhysicsRenmin UniversityBeijing 100876China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2024年第33卷第5期

页      面：588-593页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.12274454,11774418,11374363,11674317,11974348,11834014,and 21373191) the Strategic Priority Research Program of CAS(Grant Nos.XDB28000000 and XDB33000000) the National Natural Science Foundation of China(Grant No.11974348) the Training Program of Major Research Plan of NSFC(Grant No.92165105) the Outstanding Innovative Talents Cultivation Funded Programs 2023 of Renmin University of China。 

主　　题：quantum dots chiral topology blocking 

摘      要：We utilize the calculation of hierarchical equations of motion to demonstrate that the spin-dependent properties between adjacent quantum dots(QDs)can be changed by breaking the internal symmetry configuration,corresponding to the inversion of dominant chiral states.In the linear triple quantum dots(LTQDs)connected to two electron reservoirs,we can observe that the blockage appears at the triangle triple quantum dots(TTQDs)by gradually increasing the coupling strength between next-nearest double QDs.When the initial coupling between LTQDs has altered,the internal chiral circulation also undergoes the corresponding transform,thus achieving qualitative regulation and detection of the blocking region.We also investigate the response of the chiral circulation to the dot–lead coupling strength,indicating the overall robust chiral circulation of the TTQDs frustration.