Rademacher, Markus;
(2024)
Control of levitated nanorotors for quantum optomechanics.
Doctoral thesis (Ph.D), UCL (University College London).
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Abstract
This thesis presents a comprehensive study on the control of levitated nanorotors for quantum optomechanics. The research focuses on the mathematical modelling and simulation of levitated nanorotors and the development of experimental methods for determining the properties of single nanoparticles. The motivation for this study stems from the increasing interest in the field of quantum optomechanics, which deals with the manipulation of mechanical systems at the quantum level. The ability to control levitated nanorotors is crucial for implementing quantum technologies such as quantum sensing. The theoretical framework includes the computation of force noise, total force and torque noise, and the significance of librational motions for translational damping ratios. The simulation results show the dynamics of levitated nanorotors of different shapes such as spheres, prolate spheroids and octahedrons. The experimental methodology includes the significance of librational motions in scattered light detection and the results of the study on prolate spheroids and octahedrons. One of the critical contributions of this thesis is the development of a method for determining the properties of single nanoparticles. This is achieved through analysing scattered light and the computation of directional scattering coefficients. The results show that the method effectively determines the properties of various nanoparticles, including spheres, ellipsoids, and irregular octahedrons. The thesis also presents a discussion on directional scattering for angular feedback. This is a crucial aspect of controlling levitated nanorotors and has potential applications in quantum sensing and metrology. The conclusion of the thesis summarises the overall results and highlights the future prospects of the research in this field. The findings of this thesis contribute to the advancement of the field of quantum optomechanics and pave the way for the development of practical applications of levitated nanorotors in quantum technologies.
| Type: | Thesis (Doctoral) |
|---|---|
| Qualification: | Ph.D |
| Title: | Control of levitated nanorotors for quantum optomechanics |
| Open access status: | An open access version is available from UCL Discovery |
| Language: | English |
| Additional information: | Copyright © The Author 2024. Original content in this thesis is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) Licence (https://creativecommons.org/licenses/by-nc/4.0/). Any third-party copyright material present remains the property of its respective owner(s) and is licensed under its existing terms. Access may initially be restricted at the author’s request. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10189188 |
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