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Cosmic Veiling and Pre-Inflationary Initial Conditions in R+R2Gravity
Cosmic Veiling and Pre-Inflationary Initial Conditions in R+R2Gravity
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152110
- ISBN
- 9798384211174
- DDC
- 600
- 서명/저자
- Cosmic Veiling and Pre-Inflationary Initial Conditions in R+R2Gravity
- 발행사항
- [Sl] : The Pennsylvania State University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 116 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
- 주기사항
- Advisor: Bianchi, Eugenio.
- 학위논문주기
- Thesis (Ph.D.)--The Pennsylvania State University, 2024.
- 초록/해제
- 요약In this thesis, we propose and explore the consequences of the principle of cosmic veiling for the pre-inflationary epoch of the universe. The principle is based on the requirement that there exists a consistent post-Planckian, but pre-inflationary epoch of the universe in which the framework of perturbative quantum field theory remains valid, and that the transition is smooth. Inflation then functions as a censor of the initial singularity by pushing back the Planck scale further into the past, serving a role similar to horizons of black holes that censor their singularities. The principle of cosmic veiling allows then a maximumamount of inflationary e-foldings to just barely censor the initial singularity. The initial quantum state is prepared at the transition between the quantum gravity and quantum field theory regimes, and is chosen to be compatible with cosmic veiling, that is, the initial state should not spoil the veiling by containing additional information from the Planck epoch, defined as the epoch when the curvature length scale is of the order of the Planck length.An immediate consequence of this principle is, by allowing ourselves to push the domain of validity of quantum field theory to its maximal limit, we can set initial conditions at an earlier time. Classically, singularities are censored to prevent pathologies in the causual structure of the manifold. In conjunction with quantum mechanics, Hawking provided a mechanism through which one could peer at the singularity- only very barely- at the end of the black hole's life, through Hawking evaporation of black holes. Cosmic veiling is a similar, mild violation of the censorship of the initial singularity- we elevate the role of inflation as a censor that pushes back in time the Planck scale and require that the amount of inflation is bounded from above such that we can peer back far enough to observe some features from the primordial epoch. In this manner, the amount of inflation, which is already bounded from below by requiring sufficient e-foldings to be compatible with observation, we can postulate a very narrow "Goldilocks" band in which inflation lasts long enough to make our universe interesting, but not observationally excluded. We determine the effect on the cosmic microwave background and discuss the possibility of future observations.
- 일반주제명
- Friction
- 일반주제명
- Spacetime
- 일반주제명
- Equality
- 일반주제명
- Quantum field theory
- 일반주제명
- Gravity
- 일반주제명
- Black holes
- 일반주제명
- Probability distribution
- 일반주제명
- Geometry
- 일반주제명
- Radiation
- 일반주제명
- Censorship
- 일반주제명
- Universe
- 일반주제명
- Astronomy
- 일반주제명
- Astrophysics
- 일반주제명
- Quantum physics
- 일반주제명
- Statistics
- 일반주제명
- Theoretical physics
- 기본자료저록
- Dissertations Abstracts International. 86-03B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152110
■006m o d
■007cr#unu||||||||
■020 ▼a9798384211174
■035 ▼a(MiAaPQ)AAI31353818
■035 ▼a(MiAaPQ)PennState30407maf1052
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a600
■1001 ▼aFlores, Miguel Alberto Fernandez.
■24510▼aCosmic Veiling and Pre-Inflationary Initial Conditions in R+R2Gravity
■260 ▼a[Sl]▼bThe Pennsylvania State University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a116 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-03, Section: B.
■500 ▼aAdvisor: Bianchi, Eugenio.
■5021 ▼aThesis (Ph.D.)--The Pennsylvania State University, 2024.
■520 ▼aIn this thesis, we propose and explore the consequences of the principle of cosmic veiling for the pre-inflationary epoch of the universe. The principle is based on the requirement that there exists a consistent post-Planckian, but pre-inflationary epoch of the universe in which the framework of perturbative quantum field theory remains valid, and that the transition is smooth. Inflation then functions as a censor of the initial singularity by pushing back the Planck scale further into the past, serving a role similar to horizons of black holes that censor their singularities. The principle of cosmic veiling allows then a maximumamount of inflationary e-foldings to just barely censor the initial singularity. The initial quantum state is prepared at the transition between the quantum gravity and quantum field theory regimes, and is chosen to be compatible with cosmic veiling, that is, the initial state should not spoil the veiling by containing additional information from the Planck epoch, defined as the epoch when the curvature length scale is of the order of the Planck length.An immediate consequence of this principle is, by allowing ourselves to push the domain of validity of quantum field theory to its maximal limit, we can set initial conditions at an earlier time. Classically, singularities are censored to prevent pathologies in the causual structure of the manifold. In conjunction with quantum mechanics, Hawking provided a mechanism through which one could peer at the singularity- only very barely- at the end of the black hole's life, through Hawking evaporation of black holes. Cosmic veiling is a similar, mild violation of the censorship of the initial singularity- we elevate the role of inflation as a censor that pushes back in time the Planck scale and require that the amount of inflation is bounded from above such that we can peer back far enough to observe some features from the primordial epoch. In this manner, the amount of inflation, which is already bounded from below by requiring sufficient e-foldings to be compatible with observation, we can postulate a very narrow "Goldilocks" band in which inflation lasts long enough to make our universe interesting, but not observationally excluded. We determine the effect on the cosmic microwave background and discuss the possibility of future observations.
■590 ▼aSchool code: 0176.
■650 4▼aFriction
■650 4▼aSpacetime
■650 4▼aEquality
■650 4▼aQuantum field theory
■650 4▼aGravity
■650 4▼aBlack holes
■650 4▼aProbability distribution
■650 4▼aGeometry
■650 4▼aRadiation
■650 4▼aCensorship
■650 4▼aUniverse
■650 4▼aAstronomy
■650 4▼aAstrophysics
■650 4▼aQuantum physics
■650 4▼aStatistics
■650 4▼aTheoretical physics
■690 ▼a0606
■690 ▼a0596
■690 ▼a0599
■690 ▼a0463
■690 ▼a0753
■71020▼aThe Pennsylvania State University.
■7730 ▼tDissertations Abstracts International▼g86-03B.
■790 ▼a0176
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162903▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


