Charge sensing and spin relaxation times of holes in Ge hut wires (Record no. 374017)

000 -LEADER
fixed length control field 02583ntm a22004097a 4500
003 - CONTROL NUMBER IDENTIFIER
control field AT-ISTA
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20190813152041.0
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 190813s2018 au ||||| m||| 00| 0 eng d
040 ## - CATALOGING SOURCE
Transcribing agency IST
100 ## - MAIN ENTRY--PERSONAL NAME
Personal name Vukusic, Lada
9 (RLIN) 4469
245 ## - TITLE STATEMENT
Title Charge sensing and spin relaxation times of holes in Ge hut wires
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Name of publisher, distributor, etc. IST Austria
Date of publication, distribution, etc. 2018
500 ## - GENERAL NOTE
General note Thesis
505 ## - FORMATTED CONTENTS NOTE
Formatted contents note Abstract
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Formatted contents note Acknowledgments
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Formatted contents note About the Author
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Formatted contents note List of Publications
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Formatted contents note List of Tables
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Formatted contents note List of Figures
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Formatted contents note List of Abbreviations
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Formatted contents note 1 Introduction
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Formatted contents note 2 Self-assembled SiGe nanostructures
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Formatted contents note 3 Basics of transport in quantum dots
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Formatted contents note 4 Fabrication and measurement techniques
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Formatted contents note 5 Charge sensing in Ge hut wires
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Formatted contents note 6 Hole tunnelling times in Ge hut wires
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Formatted contents note 7 Single-shot readout of hole spins in Ge
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Formatted contents note 8 Conclusion and outlook
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Formatted contents note Bibliography
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Formatted contents note A Fabrication details
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Formatted contents note B Electrical circuit components
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Formatted contents note C Rise time calculation
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Formatted contents note D Software
520 ## - SUMMARY, ETC.
Summary, etc. A qubit, a unit of quantum information, is essentially any quantum mechanical two-level system which can be coherently controlled. Still, to be used for computation, it has to fulfill criteria. Qubits, regardless of the system in which they are realized, suffer from decoherence. This leads to loss of the information stored in the qubit. The upper bound of the time scale on which decoherence happens is set by the spin relaxation time. In this thesis I studied a two-level system consisting of a Zeeman-split hole spin confined in a quantum dot formed in a Ge hut wire. Such Ge hut wires have emerged as a promising material system for the realization of spin qubits, due to the combination of two significant properties: long spin coherence time as expected for group IV semiconductors due to the low hyperfine interaction and a strong valence band spin-orbit coupling. Here, I present how to fabricate quantum dot devices suitable for electrical transport measurements. Coupled quantum dot devices allowed the realization of a charge sensor, which is electrostatically and tunnel coupled to a quantum dot. By integrating the charge sensor into a radio-frequency reflectometry setup, I performed for the first time single-shot readout measurements of hole spins and extracted the hole spin relaxation times in Ge hut wires.
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://doi.org/10.15479/AT:ISTA:TH_1047">https://doi.org/10.15479/AT:ISTA:TH_1047</a>
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme
Holdings
Withdrawn status Lost status Source of classification or shelving scheme Damaged status Not for loan Permanent Location Current Location Date acquired Barcode Date last seen Price effective from Koha item type
  Not Lost       Library Library 2019-08-13 AT-ISTA#001869 2019-08-13 2019-08-13 Book

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