Projects per year
Abstract
This thesis concerns theoretical aspects of electrons in manmade nanostruc
tures. Advances in nanofabrication technology during recent decades have
made it possible to produce electrical devices on the nanoscale, whose func
tionality is determined by the quantum mechanical nature of a single or a few
electrons. Such fewelectron devices are expected to form the building blocks
of future electrical circuits and it is thus necessary to develop a thorough
theoretical understanding of the physics of electrons in nanostructures. Re
garding applications there is a particular interest in the possibilities o®ered
by the quantum mechanical behavior of electrons when it comes to informa
tion processing. This branch of research is also concerned with fundamental
questions in physics.
Besides an introduction to the abovementioned subjects, the thesis con
tains a number of contributions to the ¯elds of coherent electron manip
ulation and the statistical description of electron transport through nano
devices. The physics of the electrons are described with a combination of
numerical methods, developed and applied in the thesis, and more analytical
approaches, which are also discussed. The thesis contains a study of the in
teraction between the spins of electrons and proposals for novel methods of
con¯ning and manipulating electrons in nanostructures. Moreover, a novel
coupling mechanism between electron spins and light in the form of photons is
described, which could ¯nd applications in quantumbased communication.
The statistical description of electron transport through nanostructures is
based on rate equations, and the primary contribution of the thesis in that
respect is the development of a method that allows for the calculation of the
distribution of electrons passing through a device. The method is illustrated
with applications to two nanoelectromechanical systems and is ¯nally ex
tended such that it also takes into account possible memory e®ects in the
transport.
Original language  English 

Number of pages  188 

Publication status  Published  Oct 2007 
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 1 Finished

Quantumlimited measurement in mesoscopic
Flindt, C., Jauho, A., Flensberg, K., Mork, J., Brandes, T. & Loss, D.
15/08/2004 → 29/10/2007
Project: PhD