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A study of circuit Complexity for Coherent States

Computational complexity is a popular quantity in quantum information theory. It has made huge strides in recent years in the study of black hole dynamics. A brief definition of complexity is the measure of how difficult it is to implement a task. For a quantum system, complexity evaluates the diffi...

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Main Author: Tladi, Mpho
Other Authors: Haque, Shajid
Format: Thesis
Language:English
Published: Department of Mathematics and Applied Mathematics 2023
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access_status_str Open Access
author Tladi, Mpho
author2 Haque, Shajid
author_browse Haque, Shajid
Tladi, Mpho
author_facet Haque, Shajid
Tladi, Mpho
author_sort Tladi, Mpho
collection Thesis
description Computational complexity is a popular quantity in quantum information theory. It has made huge strides in recent years in the study of black hole dynamics. A brief definition of complexity is the measure of how difficult it is to implement a task. For a quantum system, complexity evaluates the difficulty of preparing a quantum state from a given reference state by unitary transformations. However, in the dual gravity theory complexity has a geometric meaning. In some black hole context, Leonard Susskind and collaborators proposed two holographic conjectures. The Complexity=Volume (CV) states that complexity of the boundary field theory is dual to the volume of a co dimension one maximal surface that extends to the boundary of the Ads space. Complexity=Action (CA) posits that complexity of the boundary is the same as the action evaluated as an action on patch in the bulk defined as the Wheeler De Witt patch. In recent years, these two conjectures have initiated an extensive study of complexity. This thesis is also motivated by these conjectures and will investigate complexity in the field theory side of the story. Specifically, we will explore the complexity for coherent states. We will start with a review of different methods of computing complexity. Finally, we then investigate the complexity for coherent states by using the methods of circuit complexity and operator complexity
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institution University of Cape Town (South Africa)
language eng
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license_str Not specified — see source repository
provenance_str_mv Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository
publishDate 2023
publishDateRange 2023
publishDateSort 2023
publisher Department of Mathematics and Applied Mathematics
publisherStr Department of Mathematics and Applied Mathematics
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source_str UCTD — University of Cape Town Open Access Repository
spelling oai:open.uct.ac.za:11427/37303 A study of circuit Complexity for Coherent States Tladi, Mpho Haque, Shajid Murugan, Jeffrey Weltman, Amanda Mathematics and Applied Mathematics Computational complexity is a popular quantity in quantum information theory. It has made huge strides in recent years in the study of black hole dynamics. A brief definition of complexity is the measure of how difficult it is to implement a task. For a quantum system, complexity evaluates the difficulty of preparing a quantum state from a given reference state by unitary transformations. However, in the dual gravity theory complexity has a geometric meaning. In some black hole context, Leonard Susskind and collaborators proposed two holographic conjectures. The Complexity=Volume (CV) states that complexity of the boundary field theory is dual to the volume of a co dimension one maximal surface that extends to the boundary of the Ads space. Complexity=Action (CA) posits that complexity of the boundary is the same as the action evaluated as an action on patch in the bulk defined as the Wheeler De Witt patch. In recent years, these two conjectures have initiated an extensive study of complexity. This thesis is also motivated by these conjectures and will investigate complexity in the field theory side of the story. Specifically, we will explore the complexity for coherent states. We will start with a review of different methods of computing complexity. Finally, we then investigate the complexity for coherent states by using the methods of circuit complexity and operator complexity 2023-03-07T10:19:04Z 2023-03-07T10:19:04Z 2022 2023-02-21T07:24:35Z Master Thesis Masters MSc http://hdl.handle.net/11427/37303 eng application/pdf Department of Mathematics and Applied Mathematics Faculty of Science
spellingShingle Mathematics and Applied Mathematics
Tladi, Mpho
A study of circuit Complexity for Coherent States
thesis_degree_str Master's
title A study of circuit Complexity for Coherent States
title_full A study of circuit Complexity for Coherent States
title_fullStr A study of circuit Complexity for Coherent States
title_full_unstemmed A study of circuit Complexity for Coherent States
title_short A study of circuit Complexity for Coherent States
title_sort study of circuit complexity for coherent states
topic Mathematics and Applied Mathematics
url http://hdl.handle.net/11427/37303
work_keys_str_mv AT tladimpho astudyofcircuitcomplexityforcoherentstates
AT tladimpho studyofcircuitcomplexityforcoherentstates