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Quantum transport through a transverse quantum-dot shuttle
Alternative TitlePhys. Rev. B
Jiang, Z. T.1,2; Yu, C. L.1; Zhao, R. M.1; Lue, J.1; Han, Q. Z.3
2011-05-09
Source PublicationPHYSICAL REVIEW B
ISSN1098-0121
Volume83Issue:19Pages:195308
AbstractAtransverse 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.; 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.
KeywordNanoelectromechanical Systems Electron-transport Cooper Pairs
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1103/PhysRevB.83.195308
URL查看原文
Indexed BySCI
Language英语
WOS KeywordNANOELECTROMECHANICAL SYSTEMS ; ELECTRON-TRANSPORT ; COOPER PAIRS
WOS Research AreaPhysics
WOS SubjectPhysics, Condensed Matter
WOS IDWOS:000290387400010
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/6465
Collection研究所(批量导入)
Affiliation1.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
Recommended Citation
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.
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