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Aspects of Holography in AdS and Flat Spacetime
Aspects of Holography in AdS and Flat Spacetime
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152718
- ISBN
- 9798384470014
- DDC
- 530.1
- 저자명
- Krishna, Hare.
- 서명/저자
- Aspects of Holography in AdS and Flat Spacetime
- 발행사항
- [Sl] : State University of New York at Stony Brook, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 282 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
- 주기사항
- Advisor: Rocek, Martin;Sterman, George.
- 학위논문주기
- Thesis (Ph.D.)--State University of New York at Stony Brook, 2024.
- 초록/해제
- 요약In this thesis, I studied the aspects of holography in asymptotic AdS and flat spacetime. In asymptotic AdS spacetime, the dictionary between gravitational and CFT observables on its boundary is well developed and goes by the name of AdS/CFT. I studied two different applications of this duality. First, I investigated how the effects of Blackhole singularities is encoded in CFT observables. The two-point correlation function of heavy operators which is well approximated by a geodesic goes near the singularities and decays into gravitons. Next, I studied the N = (2, 2) AdS3/CFT2 dualities. The bulk geometry is AdS3 x (S3 x T 4 )/Zk, and the CFT is a deformation of the symmetric orbifold of the supersymmetric sigma model T 4/Zk (with k = 2, 3, 4, 6). I study the appropriate helicity-trace index of the boundary CFTs which reproduces only a fraction ( 1 − 1/k ) of the Bekenstein-Hawking entropy of the associated macroscopic black branes.Using the ideas from AdS/CFT, flat space holography became an active area of research. The dictionary between the gravitational theories in asymptotic flat spacetime and Celestial CFT ("CCFT") living on null infinity has not been developed yet. However sub-stantial progress is made in understanding the CCFT dual of soft sector of gravitational and gauge theories. In this thesis, I studied the loop-corrected soft theorem (logarithmic) and showed these are universal at the loop level. These soft factors are understood as conserved charges at null infinity. These soft gluon/graviton are understood as operators on the celestial sphere having integer conformal dimensions. I studied the OPE of these operators. These OPEs receive correction from loop effects. In the graviton sector, I found additional wedge algebra of w1+∞ in addition to the algebra present at the tree level. The more formal aspects of CCFT like unitarity, causality, analyticity etc. are not understood in celestial variables. To understand more formal aspect, I studied chiral string theory which can serve as a necessary tool to understand the CCFT. The more appealing aspect of chiral string is its spectrum which consists only of graviton and gluon. I studied the OPE of vertex operators (Mellin transformed) of chiral strings and found a remarkable match with the OPE of celestial CFT. The aspects of unitarity and causality are more transparent in chiral string theory.
- 일반주제명
- Theoretical physics
- 일반주제명
- Astrophysics
- 일반주제명
- Astronomy
- 키워드
- Holography
- 키워드
- AdS spacetime
- 키워드
- Flat spacetime
- 기타저자
- State University of New York at Stony Brook Physics
- 기본자료저록
- Dissertations Abstracts International. 86-04B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017163516
■00520250211152718
■006m o d
■007cr#unu||||||||
■020 ▼a9798384470014
■035 ▼a(MiAaPQ)AAI31489432
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.1
■1001 ▼aKrishna, Hare.
■24510▼aAspects of Holography in AdS and Flat Spacetime
■260 ▼a[Sl]▼bState University of New York at Stony Brook▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a282 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-04, Section: B.
■500 ▼aAdvisor: Rocek, Martin;Sterman, George.
■5021 ▼aThesis (Ph.D.)--State University of New York at Stony Brook, 2024.
■520 ▼aIn this thesis, I studied the aspects of holography in asymptotic AdS and flat spacetime. In asymptotic AdS spacetime, the dictionary between gravitational and CFT observables on its boundary is well developed and goes by the name of AdS/CFT. I studied two different applications of this duality. First, I investigated how the effects of Blackhole singularities is encoded in CFT observables. The two-point correlation function of heavy operators which is well approximated by a geodesic goes near the singularities and decays into gravitons. Next, I studied the N = (2, 2) AdS3/CFT2 dualities. The bulk geometry is AdS3 x (S3 x T 4 )/Zk, and the CFT is a deformation of the symmetric orbifold of the supersymmetric sigma model T 4/Zk (with k = 2, 3, 4, 6). I study the appropriate helicity-trace index of the boundary CFTs which reproduces only a fraction ( 1 − 1/k ) of the Bekenstein-Hawking entropy of the associated macroscopic black branes.Using the ideas from AdS/CFT, flat space holography became an active area of research. The dictionary between the gravitational theories in asymptotic flat spacetime and Celestial CFT ("CCFT") living on null infinity has not been developed yet. However sub-stantial progress is made in understanding the CCFT dual of soft sector of gravitational and gauge theories. In this thesis, I studied the loop-corrected soft theorem (logarithmic) and showed these are universal at the loop level. These soft factors are understood as conserved charges at null infinity. These soft gluon/graviton are understood as operators on the celestial sphere having integer conformal dimensions. I studied the OPE of these operators. These OPEs receive correction from loop effects. In the graviton sector, I found additional wedge algebra of w1+∞ in addition to the algebra present at the tree level. The more formal aspects of CCFT like unitarity, causality, analyticity etc. are not understood in celestial variables. To understand more formal aspect, I studied chiral string theory which can serve as a necessary tool to understand the CCFT. The more appealing aspect of chiral string is its spectrum which consists only of graviton and gluon. I studied the OPE of vertex operators (Mellin transformed) of chiral strings and found a remarkable match with the OPE of celestial CFT. The aspects of unitarity and causality are more transparent in chiral string theory.
■590 ▼aSchool code: 0771.
■650 4▼aTheoretical physics
■650 4▼aAstrophysics
■650 4▼aAstronomy
■653 ▼aHolography
■653 ▼aAdS spacetime
■653 ▼aFlat spacetime
■653 ▼aGravitational theory
■690 ▼a0753
■690 ▼a0596
■690 ▼a0606
■71020▼aState University of New York at Stony Brook▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-04B.
■790 ▼a0771
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163516▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


