Spin dynamics in doped semiconductor quantum dots
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Date
2015
Authors
Hackmann, Johannes
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Abstract
Motivated by its possible role in quantum information processing, the spin dynamics in doped
semiconductor quantum dots has been subject of numerous investigations in the past and is
still studied intensively until the present day. One experimental approach to the measurement
of spin dynamics is the spin noise spectroscopy. While it has not been addressed by many
theoretical studies in the past, it will be subject of this work.
Accordingly, the scope of this work is to present a theoretical model that is capable of
describing the spin dynamics of resident electrons and holes confined in semiconductor
quantum dots. Based on the Chebyshev polynomial expansion technique, the physical
properties of the introduced model are investigated in detail and we demonstrate that it
reproduces the results of several recent experiments adequately. Thereby this work constitutes
the first fully quantum mechanical study that unifies the experimentally observed spin
dynamics in n- and p-doped semiconductor quantum dots. At the same time an in-depth
insight into the influence of the microscopic quantum dot properties onto the spin dynamics of
the resident electron or hole is granted for the first time.
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Keywords
Zentralspinmodell, Halbleiter, Quatenpunkte, Spindynamik