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Title: Nuclear spin control and manipulation in self-assembled quantum dots
Author: Hinchliff, Janna
ISNI:       0000 0004 7968 2373
Awarding Body: University of Bristol
Current Institution: University of Bristol
Date of Award: 2019
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Quantum dots come in many shapes and sizes, with a huge variety of material and optical properties. The subject of this thesis will be to examine the environment of self-assembled InGaAs quantum dots for applications in quantum information processing. Quantum dots are made up of many atoms, each of which has a spin and it is the dynamics of these nuclear spins and their effect on an electron spin confined in the quantum dot that we will discuss. There are numerous applications for quantum dots in the field of quantum information processing, many of which exploit their atom-like optical properties using light-matter interactions. The application that will be the focus of this thesis is the nuclear spin quantum memory - a device that is able to store quantum states on long timescales. We will show both theoretical and experimental results that indicate ways in which we can gain control of the nuclear spin dynamics. We demonstrate this by designing an optical setup capable of measuring the precession frequency of an electron spin and show how we can induce changes in this precession frequency by controlling the configuration of the nuclear spin bath. We also discuss how we can manipulate this system to create a nuclear spin quantum memory - storing the initial state of the electron spin in a single nucleus. We also discuss how we can exploit the nuclei within the quantum dot as qubits to expand this protocol into a full-scale quantum computing model.
Supervisor: McCutcheon, Dara ; Oulton, Ruth Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available