Imperial College London

Emeritus ProfessorAngusMacKinnon

Faculty of Natural SciencesDepartment of Physics

Visiting Professor
 
 
 
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Contact

 

+44 (0)20 7594 7540a.mackinnon Website CV

 
 
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Location

 

812Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Tahir:2010:10.1103/PhysRevB.81.195444,
author = {Tahir, M and MacKinnon, A},
doi = {10.1103/PhysRevB.81.195444},
journal = {PHYSICAL REVIEW B},
title = {Time-dependent quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator},
url = {http://dx.doi.org/10.1103/PhysRevB.81.195444},
volume = {81},
year = {2010}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - We present a theoretical study of time-dependent quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator within the nonequilibrium Green’s function technique. An arbitrary voltage is applied to the tunnel junction and electrons in the leads are considered to be at zero temperature. The transient and the steady-state behavior of the system are considered here in order to explore the quantum dynamics of the oscillator as a function of time. The properties of the phonon distribution of the nanomechanical oscillator strongly coupled to the electrons on the dot are investigated using a nonperturbative approach. We consider both the energy transferred from the electrons to the oscillator and the Fano factor as a function of time. We discuss the quantum dynamics of the nanomechanical oscillator in terms of pure and mixed states. We have found a significant difference between a quantum and a classical oscillator. In particular, the energy of a classical oscillator will always be dissipated by the electrons whereas the quantum oscillator remains in an excited state. This will provide useful insight for the design of experiments aimed at studying the quantum behavior of an oscillator.
AU - Tahir,M
AU - MacKinnon,A
DO - 10.1103/PhysRevB.81.195444
PY - 2010///
SN - 1098-0121
TI - Time-dependent quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator
T2 - PHYSICAL REVIEW B
UR - http://dx.doi.org/10.1103/PhysRevB.81.195444
UR - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000278142000133&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR - http://hdl.handle.net/10044/1/63411
VL - 81
ER -