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Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds / PAUL MERRIKIN

Swansea University Author: PAUL MERRIKIN

DOI (Published version): 10.23889/SUThesis.71060

Abstract

In this thesis, the AdS/CFT correspondence is used as a tool to explore novel AdS5 Super-gravity backgrounds (containing five-dimensional Anti-de Sitter spacetime) and their dual (four dimensional) Conformal Field Theory descriptions. In order to obtain precise results, both conformal symmetry and su...

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Published: Swansea 2025
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Nunez, C.
URI: https://cronfa.swan.ac.uk/Record/cronfa71060
first_indexed 2025-12-03T12:36:50Z
last_indexed 2025-12-05T09:33:47Z
id cronfa71060
recordtype RisThesis
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spelling 2025-12-03T12:44:22.6396771 v2 71060 2025-12-03 Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds 6d5c0ba186b4735acc3e409386dfdd3c PAUL MERRIKIN PAUL MERRIKIN true false 2025-12-03 In this thesis, the AdS/CFT correspondence is used as a tool to explore novel AdS5 Super-gravity backgrounds (containing five-dimensional Anti-de Sitter spacetime) and their dual (four dimensional) Conformal Field Theory descriptions. In order to obtain precise results, both conformal symmetry and supersymmetry play an important role. However, in order to align with experimental observation, supersymmetry must be broken at low energies. In the absence of supersymmetry, finding deformations of a CFT which are marginal in nature (preserving conformal symmetry) is currently not well understood. Nevertheless, the solutions presented in this work may offer the best evidence to date of such deformations. Multi-parameter families of non-supersymmetric type IIA and type IIB AdS5 solutions are presented, promoting to N = 1 supersymmetry in some special cases. Contained within these solutions is an existing class of N = 2 type IIA solutions, recovered in one example when both deformation parameters are fixed to zero. The supersymmetry is studied using the method of G-structures, with the boundaries of the solutions carefully investigated - uncovering orbifold singularities within some solutions. In the type IIA backgrounds, both the spindle and its higher dimensional analogue play an important role, giving rise to rational quantization of charge. All parameters drop out of a quantity called the holographic central charge, pointing to marginal deformations of the existing d = 4 N = 2 long linear quiver CFT. These marginal deformations are proposed to correspond to soft-SUSY breaking, with the Lagrangian nature of the CFT broken in some cases. E-Thesis Swansea High Energy Physics Theory (hep-th) 9 9 2025 2025-09-09 10.23889/SUThesis.71060 COLLEGE NANME COLLEGE CODE Swansea University Nunez, C. Doctoral Ph.D 2025-12-03T12:44:22.6396771 2025-12-03T12:28:03.1201159 Faculty of Science and Engineering School of Biosciences, Geography and Physics - Physics PAUL MERRIKIN 1 71060__35735__bc219369ebef453f8f2353fa7e4827e8.pdf 2025_Merrikin_P.final.71060.pdf 2025-12-03T12:36:06.5604120 Output 1957499 application/pdf E-Thesis – open access true Copyright: the author, Paul Merrikin, 2025 true eng
title Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
spellingShingle Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
PAUL MERRIKIN
title_short Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
title_full Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
title_fullStr Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
title_full_unstemmed Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
title_sort Marginally deformed AdS₅/CFT₄ and spindle-like orbifolds
author_id_str_mv 6d5c0ba186b4735acc3e409386dfdd3c
author_id_fullname_str_mv 6d5c0ba186b4735acc3e409386dfdd3c_***_PAUL MERRIKIN
author PAUL MERRIKIN
author2 PAUL MERRIKIN
format E-Thesis
publishDate 2025
institution Swansea University
doi_str_mv 10.23889/SUThesis.71060
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 In this thesis, the AdS/CFT correspondence is used as a tool to explore novel AdS5 Super-gravity backgrounds (containing five-dimensional Anti-de Sitter spacetime) and their dual (four dimensional) Conformal Field Theory descriptions. In order to obtain precise results, both conformal symmetry and supersymmetry play an important role. However, in order to align with experimental observation, supersymmetry must be broken at low energies. In the absence of supersymmetry, finding deformations of a CFT which are marginal in nature (preserving conformal symmetry) is currently not well understood. Nevertheless, the solutions presented in this work may offer the best evidence to date of such deformations. Multi-parameter families of non-supersymmetric type IIA and type IIB AdS5 solutions are presented, promoting to N = 1 supersymmetry in some special cases. Contained within these solutions is an existing class of N = 2 type IIA solutions, recovered in one example when both deformation parameters are fixed to zero. The supersymmetry is studied using the method of G-structures, with the boundaries of the solutions carefully investigated - uncovering orbifold singularities within some solutions. In the type IIA backgrounds, both the spindle and its higher dimensional analogue play an important role, giving rise to rational quantization of charge. All parameters drop out of a quantity called the holographic central charge, pointing to marginal deformations of the existing d = 4 N = 2 long linear quiver CFT. These marginal deformations are proposed to correspond to soft-SUSY breaking, with the Lagrangian nature of the CFT broken in some cases.
published_date 2025-09-09T06:50:56Z
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score 11.090362

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