| Majorana tunneling in a non-Hermitian double-quantum-dot structure | |
| Niu, Peng-Bin1; Zhang, Yang1; Wang, Qiang2; Luo, Hong-Gang3,4,5 | |
| 2023-08-15 | |
| Online publication date | 2023-05 |
| Source Publication | PHYSICA B-CONDENSED MATTER Impact Factor & Quartile |
| ISSN | 0921-4526 |
| Volume | 663 |
| page numbers | 8 |
| Abstract | In this paper, we investigate a non-Hermitian quantum transport system, which is formed by two quantum dots possessing PT-symmetric complex potentials and side coupled to Majorana fermions. We study the transmission coefficient first. It is found that the conductance is reduced by a factor of 1/4, i.e., G = e2/4h, which can be seen as a signature of Majorana fermion in this double quantum dots structure. It is also found that the joint effects of Majorana tunneling, PT-symmetric complex potentials and dot energy level are mainly as follows: merging process, asymmetry and exceptional point. Then we study the current and conductance driven by a voltage or temperature gradient. Due to the merging process and asymmetry, the thermal current and conductance change sign drastically near the exceptional point. With large fixed temperature difference, the relationship between thermal current and dot level becomes linear, which is a manifestation of Majorana fermion's robustness. These results can be useful in understanding the quantum transport behaviors modified by the interplay between PT symmetry and Majorana fermions. |
| Keyword | Majorana fermion Quantum dot Non-Hermitian PT-symmetry |
| Publisher | ELSEVIER |
| DOI | 10.1016/j.physb.2023.414974 |
| Indexed By | SCIE |
| Language | 英语 |
| WOS Research Area | Physics |
| WOS Subject | Physics, Condensed Matter |
| WOS ID | WOS:001002241200001 |
| Original Document Type | Article |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://ir.lzu.edu.cn/handle/262010/530588 |
| Collection | 兰州大学 |
| Corresponding Author | Zhang, Yang |
| Affiliation | 1.Shanxi Datong Univ, Dept Phys, Datong 037009, Peoples R China; 2.Taiyuan Normal Univ, Dept Phys, Jinzhong 030619, Peoples R China; 3.Lanzhou Univ, Ctr Interdisciplinary Studies, Lanzhou 730000, Peoples R China; 4.Lanzhou Univ, Key Lab Magnetism & Magnet Mat MoE, Lanzhou 730000, Peoples R China; 5.Beijing Computat Sci Res Ctr, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Niu, Peng-Bin,Zhang, Yang,Wang, Qiang,et al. Majorana tunneling in a non-Hermitian double-quantum-dot structure[J]. PHYSICA B-CONDENSED MATTER,2023,663. |
| APA | Niu, Peng-Bin,Zhang, Yang,Wang, Qiang,&Luo, Hong-Gang.(2023).Majorana tunneling in a non-Hermitian double-quantum-dot structure.PHYSICA B-CONDENSED MATTER,663. |
| MLA | Niu, Peng-Bin,et al."Majorana tunneling in a non-Hermitian double-quantum-dot structure".PHYSICA B-CONDENSED MATTER 663(2023). |
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