Steering quantum nonlocalities of quantum dot system suffering from decoherence

doi:10.1088/1674-1056/ac615a

中国物理B ›› 2022, Vol. 31 ›› Issue (9): 90302-090302.doi: 10.1088/1674-1056/ac615a

Steering quantum nonlocalities of quantum dot system suffering from decoherence

Huan Yang(杨欢)^1,2, Ling-Ling Xing(邢玲玲)¹, Zhi-Yong Ding(丁智勇)², Gang Zhang(张刚)^1,†, and Liu Ye(叶柳)³

1 School of Electrical and Photoelectronic Engineering, West Anhui University, Lu'an 237012, China;
2 Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes, Fuyang Normal University, Fuyang 236037, China;
3 School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, China

收稿日期:2021-12-06 修回日期:2022-03-11 接受日期:2022-03-28 出版日期:2022-08-19 发布日期:2022-08-24
通讯作者: Gang Zhang E-mail:zhanggang@wxc.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 12175001), the Natural Science Research Key Project of the Education Department of Anhui Province, China (Grant Nos. KJ2021A0943 and KJ2020A0527), the University Synergy Innovation Program of Anhui Province, China (Grant No. GXXT-2021-026), the Anhui Provincial Natural Science Foundation, China (Grant Nos. 2108085MA18 and 2008085MA20), the Key Project of Program for Excellent Young Talents of Anhui University, China (Grant No. gxyqZD2019042), the Open Project of Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes, China (Grant No. FMDI202106), and the Research Start-up Funding Project of High Level Talent of West Anhui University, China (Grant No. WGKQ2021048).

Steering quantum nonlocalities of quantum dot system suffering from decoherence

Huan Yang(杨欢)^1,2, Ling-Ling Xing(邢玲玲)¹, Zhi-Yong Ding(丁智勇)², Gang Zhang(张刚)^1,†, and Liu Ye(叶柳)³

1 School of Electrical and Photoelectronic Engineering, West Anhui University, Lu'an 237012, China;
2 Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes, Fuyang Normal University, Fuyang 236037, China;
3 School of Physics and Optoelectronics Engineering, Anhui University, Hefei 230601, China

Received:2021-12-06 Revised:2022-03-11 Accepted:2022-03-28 Online:2022-08-19 Published:2022-08-24
Contact: Gang Zhang E-mail:zhanggang@wxc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12175001), the Natural Science Research Key Project of the Education Department of Anhui Province, China (Grant Nos. KJ2021A0943 and KJ2020A0527), the University Synergy Innovation Program of Anhui Province, China (Grant No. GXXT-2021-026), the Anhui Provincial Natural Science Foundation, China (Grant Nos. 2108085MA18 and 2008085MA20), the Key Project of Program for Excellent Young Talents of Anhui University, China (Grant No. gxyqZD2019042), the Open Project of Key Laboratory of Functional Materials and Devices for Informatics of Anhui Higher Education Institutes, China (Grant No. FMDI202106), and the Research Start-up Funding Project of High Level Talent of West Anhui University, China (Grant No. WGKQ2021048).

摘要/Abstract

摘要： The important applications of quantum dot system are to implement logic operations and achieve universal quantum computing based on different quantum nonlocalities. Here, we characterize the quantum steering, Bell nonlocality, and nonlocal advantage of quantum coherence (NAQC) of quantum dot system suffering nonunital and unital channels. The results reveal that quantum steering, Bell nonlocality, and NAQC can display the traits of dissipation, enhancement, and freezing. One can achieve the detections of quantum steering, Bell nonlocality, and NAQC of quantum dot system in different situations. Among these quantum nonlocalities, NAQC is the most fragile, and it is most easily influenced by different system parameters. Furthermore, considering quantum dot system coupling with amplitude damping channel and phase damping channel, these quantum nonlocalities degenerate with the enlargement of the channel parameters $t$ and $\varGamma$. Remarkably, measurement reversal can effectively control and enhance quantum steering, Bell nonlocality, and NAQC of quantum dot system suffering from decoherence, especially in the scenarios of the amplitude damping channel and strong operation strength.

关键词: quantum nonlocalities, quantum dot system, decoherence, steering

Abstract: The important applications of quantum dot system are to implement logic operations and achieve universal quantum computing based on different quantum nonlocalities. Here, we characterize the quantum steering, Bell nonlocality, and nonlocal advantage of quantum coherence (NAQC) of quantum dot system suffering nonunital and unital channels. The results reveal that quantum steering, Bell nonlocality, and NAQC can display the traits of dissipation, enhancement, and freezing. One can achieve the detections of quantum steering, Bell nonlocality, and NAQC of quantum dot system in different situations. Among these quantum nonlocalities, NAQC is the most fragile, and it is most easily influenced by different system parameters. Furthermore, considering quantum dot system coupling with amplitude damping channel and phase damping channel, these quantum nonlocalities degenerate with the enlargement of the channel parameters $t$ and $\varGamma$. Remarkably, measurement reversal can effectively control and enhance quantum steering, Bell nonlocality, and NAQC of quantum dot system suffering from decoherence, especially in the scenarios of the amplitude damping channel and strong operation strength.

Key words: quantum nonlocalities, quantum dot system, decoherence, steering

中图分类号: (Quantum information)

03.67.-a

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.65.Ud (Entanglement and quantum nonlocality)

Huan Yang(杨欢), Ling-Ling Xing(邢玲玲), Zhi-Yong Ding(丁智勇), Gang Zhang(张刚), and Liu Ye(叶柳). Steering quantum nonlocalities of quantum dot system suffering from decoherence[J]. 中国物理B, 2022, 31(9): 90302-090302.

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Steering quantum nonlocalities of quantum dot system suffering from decoherence

Steering quantum nonlocalities of quantum dot system suffering from decoherence

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