Chiral current regulation and detection of Berry phase in triangular triple quantum dots

doi:10.1088/1674-1056/acd36c

中国物理B ›› 2023, Vol. 32 ›› Issue (8): 87304-087304.doi: 10.1088/1674-1056/acd36c

Chiral current regulation and detection of Berry phase in triangular triple quantum dots

Yue Qi(齐月)¹, Yi-Ming Liu(刘一铭)¹, Yuan-Dong Wang(王援东)², Jian-Hua Wei(魏建华)^1,†, and Zhen-Gang Zhu(朱振刚)^2,‡

1. Department of Physics, Renmin University, Beijing 100876, China;
2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2023-04-07 修回日期:2023-05-06 接受日期:2023-05-09 出版日期:2023-07-14 发布日期:2023-07-14
通讯作者: Jian-Hua Wei, Zhen-Gang Zhu E-mail:wjh@ruc.edu.cn;zgzhu@ucas.ac.cn
基金资助:
Project supported by the National Natural Science Foundation of China(Grant Nos.11774418, 11374363,11674317, 11974348, 11834014,and 21373191), the Strategic Priority Research Program of CAS (Grant Nos.XDB28000000 and XDB33000000), and the Training Program of Major Research Plan of NSFC (Grant No.92165105).

Chiral current regulation and detection of Berry phase in triangular triple quantum dots

Yue Qi(齐月)¹, Yi-Ming Liu(刘一铭)¹, Yuan-Dong Wang(王援东)², Jian-Hua Wei(魏建华)^1,†, and Zhen-Gang Zhu(朱振刚)^2,‡

1. Department of Physics, Renmin University, Beijing 100876, China;
2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2023-04-07 Revised:2023-05-06 Accepted:2023-05-09 Online:2023-07-14 Published:2023-07-14
Contact: Jian-Hua Wei, Zhen-Gang Zhu E-mail:wjh@ruc.edu.cn;zgzhu@ucas.ac.cn
Supported by:
Project supported by the National Natural Science Foundation of China(Grant Nos.11774418, 11374363,11674317, 11974348, 11834014,and 21373191), the Strategic Priority Research Program of CAS (Grant Nos.XDB28000000 and XDB33000000), and the Training Program of Major Research Plan of NSFC (Grant No.92165105).

摘要/Abstract

摘要： Based on the hierarchical equations of motion (HEOM) calculation, we theoretically investigate the corresponding control of a triangular triple-quantum-dots (TTQD) ring which is connected to two reservoirs. We initially demonstrate by adding bias voltage and further adjusting the coupling strength between quantum dots, the chiral current induced by bias will go through a transformation of clockwise to counterclockwise direction and an unprecedented effective Hall angle will be triggered. The transformation is very rapid, with a corresponding characteristic time of 80-200 ps. In addition, by adding a magnetic flux to compensate for the chiral current in the original system, we elucidate the relationship between the applied magnetic flux and the Berry phase, which can realize direct measurement of the chiral current and reveal the magnetoelectric coupling relationship.

关键词: chiral current, Berry phase, quantum dots, quantum computation

Abstract: Based on the hierarchical equations of motion (HEOM) calculation, we theoretically investigate the corresponding control of a triangular triple-quantum-dots (TTQD) ring which is connected to two reservoirs. We initially demonstrate by adding bias voltage and further adjusting the coupling strength between quantum dots, the chiral current induced by bias will go through a transformation of clockwise to counterclockwise direction and an unprecedented effective Hall angle will be triggered. The transformation is very rapid, with a corresponding characteristic time of 80-200 ps. In addition, by adding a magnetic flux to compensate for the chiral current in the original system, we elucidate the relationship between the applied magnetic flux and the Berry phase, which can realize direct measurement of the chiral current and reveal the magnetoelectric coupling relationship.

Key words: chiral current, Berry phase, quantum dots, quantum computation

中图分类号: (Quantum dots)

73.21.La

11.30.Rd (Chiral symmetries) 64.70.Tg (Quantum phase transitions)

Yue Qi(齐月), Yi-Ming Liu(刘一铭), Yuan-Dong Wang(王援东), Jian-Hua Wei(魏建华), and Zhen-Gang Zhu(朱振刚). Chiral current regulation and detection of Berry phase in triangular triple quantum dots[J]. 中国物理B, 2023, 32(8): 87304-087304.

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Chiral current regulation and detection of Berry phase in triangular triple quantum dots

Chiral current regulation and detection of Berry phase in triangular triple quantum dots

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