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Modern Topics in Scalar Field Cosmology / CARI POWELL

Swansea University Author: CARI POWELL

DOI (Published version): 10.23889/SUthesis.56561

Abstract

The aim of this research is to use modern techniques in scalar field Cosmol-ogy to produce methods of detecting gravitational waves and apply them to current gravitational waves experiments and those that will be producing results in the not too distant future. In the first chapter we discuss dark mat...

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Published: Swansea 2020
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Tasinato, Gianmassimo
URI: https://cronfa.swan.ac.uk/Record/cronfa56561
first_indexed 2021-03-25T15:54:54Z
last_indexed 2021-03-26T04:22:32Z
id cronfa56561
recordtype RisThesis
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spelling 2021-03-25T16:16:20.0223947 v2 56561 2021-03-25 Modern Topics in Scalar Field Cosmology 1dbf58c6b0fd57a2cc79e95c0b44d726 CARI POWELL CARI POWELL true false 2021-03-25 The aim of this research is to use modern techniques in scalar field Cosmol-ogy to produce methods of detecting gravitational waves and apply them to current gravitational waves experiments and those that will be producing results in the not too distant future. In the first chapter we discuss dark matter and some of its candidates, specifically, the axion. We then address its relationship with gravitational waves. We also discuss inflation and how it can be used to detect gravitational waves. Chapter 2 concentrates on constructing a multi field system of axions in order to increase the mass range of the ultralight axion, putting it into the observation range of pul-sar timing arrays. Chapter 3 discusses non-attractor inflation which is able to enhance stochastic background gravitational waves at scales that allows them to be measured by gravitational wave experiments. Chapter 4 uses a similar method to chapter 3 and applies it to 3-point overlap functions for tensor, scalar and a combination of the two polarisations. E-Thesis Swansea 17 4 2020 2020-04-17 10.23889/SUthesis.56561 COLLEGE NANME COLLEGE CODE Swansea University Tasinato, Gianmassimo Doctoral Ph.D 2021-03-25T16:16:20.0223947 2021-03-25T15:50:55.0913647 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics CARI POWELL 1 56561__19565__f014ca547e76438b9504e7fb2561472a.pdf Powell_Cari_PhD_Thesis_Final_2020_Redacted_Signature.pdf 2021-03-25T16:07:33.5780742 Output 12366102 application/pdf E-Thesis – open access true Copyright: The author, Cari Powell, 2020. true eng
title Modern Topics in Scalar Field Cosmology
spellingShingle Modern Topics in Scalar Field Cosmology
CARI POWELL
title_short Modern Topics in Scalar Field Cosmology
title_full Modern Topics in Scalar Field Cosmology
title_fullStr Modern Topics in Scalar Field Cosmology
title_full_unstemmed Modern Topics in Scalar Field Cosmology
title_sort Modern Topics in Scalar Field Cosmology
author_id_str_mv 1dbf58c6b0fd57a2cc79e95c0b44d726
author_id_fullname_str_mv 1dbf58c6b0fd57a2cc79e95c0b44d726_***_CARI POWELL
author CARI POWELL
author2 CARI POWELL
format E-Thesis
publishDate 2020
institution Swansea University
doi_str_mv 10.23889/SUthesis.56561
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Biosciences, Geography and Physics - Physics{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Biosciences, Geography and Physics - Physics
document_store_str 1
active_str 0
description The aim of this research is to use modern techniques in scalar field Cosmol-ogy to produce methods of detecting gravitational waves and apply them to current gravitational waves experiments and those that will be producing results in the not too distant future. In the first chapter we discuss dark matter and some of its candidates, specifically, the axion. We then address its relationship with gravitational waves. We also discuss inflation and how it can be used to detect gravitational waves. Chapter 2 concentrates on constructing a multi field system of axions in order to increase the mass range of the ultralight axion, putting it into the observation range of pul-sar timing arrays. Chapter 3 discusses non-attractor inflation which is able to enhance stochastic background gravitational waves at scales that allows them to be measured by gravitational wave experiments. Chapter 4 uses a similar method to chapter 3 and applies it to 3-point overlap functions for tensor, scalar and a combination of the two polarisations.
published_date 2020-04-17T14:01:28Z
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score 11.048453

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