Quantum transport through a transverse quantum-dot shuttle
文献类型：期刊论文
| 作者 | Jiang, Z. T.1,2; Yu, C. L.1; Zhao, R. M.1; Lue, J.1; Han, Q. Z.3 |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011-05-09 |
| 卷号 | 83期号:19页码:195308 |
| 关键词 | nanoelectromechanical systems electron-transport cooper pairs |
| ISSN号 | 1098-0121 |
| 其他题名 | Phys. Rev. B |
| 中文摘要 | Atransverse quantum-dot (QD) shuttle (T-QDS) is proposed where the QDoscillating direction is perpendicular to the electron transmission direction, different from the usual QD shuttle where the oscillating direction is parallel to the electron transmission direction. Both the electrical and mechanical degrees of freedom are dealt with by using the full quantum mechanical approaches. We derive the modified rate equations and numerically investigate the quantum properties of the T-QDS. First, as a comparison, we study the time-dependent evolutions of the electron-occupation probabilities and the currents flowing through the classical T-QDS. It is shown that the current shows the time-dependent oscillation in phase with the oscillation of the T-QDS. Then, we turn to study the quantum properties of the quantum T-QDS. Sharply different from the classical T-QDS, no oscillations of the probabilities and the current are observed due to the quantum uncertainty of the space position of the quantum T-QDS. It is demonstrated that the effects induced by the quantized oscillation of the quantum T-QDS are reflected as the renormalization of the tunneling rates between the QD and the leads. Notably, the two tunneling rates of the QD with the left and right leads depend on the relative space positions of the leads and the QD in different ways. It is the interplay of the two tunneling rates that eventually determines the stationary current of the T-QDS. Moreover, we study the influences induced by the temperature, which can also be considered via the renormalized tunneling rates. |
| 英文摘要 | Atransverse quantum-dot (QD) shuttle (T-QDS) is proposed where the QDoscillating direction is perpendicular to the electron transmission direction, different from the usual QD shuttle where the oscillating direction is parallel to the electron transmission direction. Both the electrical and mechanical degrees of freedom are dealt with by using the full quantum mechanical approaches. We derive the modified rate equations and numerically investigate the quantum properties of the T-QDS. First, as a comparison, we study the time-dependent evolutions of the electron-occupation probabilities and the currents flowing through the classical T-QDS. It is shown that the current shows the time-dependent oscillation in phase with the oscillation of the T-QDS. Then, we turn to study the quantum properties of the quantum T-QDS. Sharply different from the classical T-QDS, no oscillations of the probabilities and the current are observed due to the quantum uncertainty of the space position of the quantum T-QDS. It is demonstrated that the effects induced by the quantized oscillation of the quantum T-QDS are reflected as the renormalization of the tunneling rates between the QD and the leads. Notably, the two tunneling rates of the QD with the left and right leads depend on the relative space positions of the leads and the QD in different ways. It is the interplay of the two tunneling rates that eventually determines the stationary current of the T-QDS. Moreover, we study the influences induced by the temperature, which can also be considered via the renormalized tunneling rates. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Physics, Condensed Matter |
| 研究领域[WOS] | Physics |
| 关键词[WOS] | NANOELECTROMECHANICAL SYSTEMS ; ELECTRON-TRANSPORT ; COOPER PAIRS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000290387400010 |
| 公开日期 | 2013-11-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6465]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Beijing Inst Technol, Dept Phys, Beijing 100081, Peoples R China 2.Beijing Inst Technol, Minist Educ China, Key Lab Cluster Sci, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jiang, Z. T.,Yu, C. L.,Zhao, R. M.,et al. Quantum transport through a transverse quantum-dot shuttle[J]. PHYSICAL REVIEW B,2011,83(19):195308. |
| APA | Jiang, Z. T.,Yu, C. L.,Zhao, R. M.,Lue, J.,&Han, Q. Z..(2011).Quantum transport through a transverse quantum-dot shuttle.PHYSICAL REVIEW B,83(19),195308. |
| MLA | Jiang, Z. T.,et al."Quantum transport through a transverse quantum-dot shuttle".PHYSICAL REVIEW B 83.19(2011):195308. |
入库方式： OAI收割
来源：过程工程研究所
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