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Aspects of Holography in AdS and Flat Spacetime
Aspects of Holography in AdS and Flat Spacetime
Aspects of Holography in AdS and Flat Spacetime

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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
키워드  
Gravitational theory
기타저자  
State University of New York at Stony Brook Physics
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
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MARC

 008250123s2024        us                              c    eng  d
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■006m          o    d                
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■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.

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