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Field Theory Aspects of Inflationary Cosmology
Field Theory Aspects of Inflationary Cosmology
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104838
- ISBN
- 9798293845248
- DDC
- 530
- 저자명
- Huang, Yiwen.
- 서명/저자
- Field Theory Aspects of Inflationary Cosmology
- 발행사항
- [Sl] : University of California, San Diego, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 207 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-03, Section: B.
- 주기사항
- Advisor: Green, Daniel.
- 학위논문주기
- Thesis (Ph.D.)--University of California, San Diego, 2025.
- 초록/해제
- 요약The era of precision cosmology, with its increasingly powerful observational probes, demands a correspondingly systematic understanding of the full landscape of possible inflationary signatures. The goal of the thesis is to develop some technical tools that can be used to facilitate the study of the cosmological correlation function. In the first part of the paper, we discuss several technical results in the context of the effective field theory (EFT) of inflation. In Chapter 1, we derive a new soft theorem for scattering amplitudes by taking the sub-horizon limit of the EFT of inflation. We then discuss the application of this theorem to inflation. In Chapter 2, we show that in general single-field inflation, the statistics of scalar metric fluctuations are given by the statistics of the Goldstone boson decoupled from gravity up to corrections that are controlled as an expansion in slow-roll parameters.The second part of the thesis investigates the infrared behavior of heavy fields in de Sitter space. In Chapter 3, we demonstrate how coupling with additional heavy fields leads to an anomalous dimension for principal series fields in de Sitter space. We show how to evaluate these anomalous dimensions using Mellin space techniques and then explore the consequences for the Soft de Sitter Effective Theory (SdSET). Finally, in Chapter 4, we provide a proof of the positivity of such anomalous dimensions using the positivity of the Fisher information matrix.
- 일반주제명
- Physics
- 일반주제명
- Statistical physics
- 일반주제명
- Theoretical physics
- 일반주제명
- Particle physics
- 기타저자
- University of California, San Diego Physics
- 기본자료저록
- Dissertations Abstracts International. 87-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104838
■006m o d
■007cr#unu||||||||
■020 ▼a9798293845248
■035 ▼a(MiAaPQ)AAI32171988
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aHuang, Yiwen.
■24510▼aField Theory Aspects of Inflationary Cosmology
■260 ▼a[Sl]▼bUniversity of California, San Diego▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a207 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-03, Section: B.
■500 ▼aAdvisor: Green, Daniel.
■5021 ▼aThesis (Ph.D.)--University of California, San Diego, 2025.
■520 ▼aThe era of precision cosmology, with its increasingly powerful observational probes, demands a correspondingly systematic understanding of the full landscape of possible inflationary signatures. The goal of the thesis is to develop some technical tools that can be used to facilitate the study of the cosmological correlation function. In the first part of the paper, we discuss several technical results in the context of the effective field theory (EFT) of inflation. In Chapter 1, we derive a new soft theorem for scattering amplitudes by taking the sub-horizon limit of the EFT of inflation. We then discuss the application of this theorem to inflation. In Chapter 2, we show that in general single-field inflation, the statistics of scalar metric fluctuations are given by the statistics of the Goldstone boson decoupled from gravity up to corrections that are controlled as an expansion in slow-roll parameters.The second part of the thesis investigates the infrared behavior of heavy fields in de Sitter space. In Chapter 3, we demonstrate how coupling with additional heavy fields leads to an anomalous dimension for principal series fields in de Sitter space. We show how to evaluate these anomalous dimensions using Mellin space techniques and then explore the consequences for the Soft de Sitter Effective Theory (SdSET). Finally, in Chapter 4, we provide a proof of the positivity of such anomalous dimensions using the positivity of the Fisher information matrix.
■590 ▼aSchool code: 0033.
■650 4▼aPhysics
■650 4▼aStatistical physics
■650 4▼aTheoretical physics
■650 4▼aParticle physics
■653 ▼aEffective field theory
■653 ▼aScalar metric fluctuations
■653 ▼aFisher information matrix
■653 ▼aCosmological correlation
■690 ▼a0605
■690 ▼a0753
■690 ▼a0217
■690 ▼a0798
■71020▼aUniversity of California, San Diego▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-03B.
■790 ▼a0033
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359121▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
