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Spacetime Symmetries from Quantum Ergodicity
Spacetime Symmetries from Quantum Ergodicity
Spacetime Symmetries from Quantum Ergodicity

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211151409
ISBN  
9798342105873
DDC  
536
저자명  
Ouseph, Shoy.
서명/저자  
Spacetime Symmetries from Quantum Ergodicity
발행사항  
[Sl] : Purdue University, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
211 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-04, Section: B.
주기사항  
Advisor: Lashkari, Nima.
학위논문주기  
Thesis (Ph.D.)--Purdue University, 2024.
초록/해제  
요약In holographic quantum field theories, a bulk geometric semiclassical spacetime emerges from strongly coupled interacting conformal field theories in one less spatial dimension. This is the celebrated AdS/CFT correspondence. The entanglement entropy of a boundary spatial subregion can be calculated as the area of a codimension two bulk surface homologous to the boundary subregion known as the RT surface. The bulk region contained within the RT surface is known as the entanglement wedge and bulk reconstruction tells us that any operator in the entanglement wedge can be reconstructed as a non-local operator on the corresponding boundary subregion. This notion that entanglement creates geometry is dubbed "ER=EPR'' and has been the driving force behind recent progress in quantum gravity research. In this thesis, we put together two results that use Tomita-Takesaki modular theory and quantum ergodic theory to make progress on contemporary problems in quantum gravity.A version of the black hole information loss paradox is the inconsistency between the decay of two-point functions of probe operators in large AdS black holes and the dual boundary CFT calculation where it is an almost periodic function of time. We show that any von Neumann algebra in a faithful normal state that is quantum strong mixing (two-point functions decay) with respect to its modular flow is a type III 1 factor and the state has a trivial centralizer. In particular, for Generalized Free Fields (GFF) in a thermofield double (KMS) state, we show that if the two-point functions are strong mixing, then the entire algebra is strong mixing and a type III 1factor settling a recent conjecture of Liu and Leutheusser.The semiclassical bulk geometry that emerges in the holographic description is a pseudo-Riemannian manifold and we expect a local approximate Poincare algebra. Near a bifurcate Killing horizon, such a local two-dimensional Poincare algebra is generated by the Killing flow and the outward null translations along the horizon. We show the emergence of such a Poincare algebra in any quantum system with modular future and past subalgebras in a limit analogous to the near-horizon limit. These are known as quantum K-systems and they saturate the modular chaos bound. We also prove that the existence of (modular) future/past von Neumann subalgebras also implies a second law of (modular) thermodynamics.
일반주제명  
Thermodynamics
일반주제명  
Gases
일반주제명  
Black holes
일반주제명  
Hilbert space
일반주제명  
Phase transitions
일반주제명  
Mathematical functions
일반주제명  
Spacetime
일반주제명  
Probability
일반주제명  
Algebra
일반주제명  
Mechanics
일반주제명  
Dynamical systems
일반주제명  
Probability distribution
일반주제명  
Ordinary differential equations
일반주제명  
Astronomy
일반주제명  
Astrophysics
일반주제명  
Mathematics
일반주제명  
Statistics
일반주제명  
Theoretical physics
기타저자  
Purdue University.
기본자료저록  
Dissertations Abstracts International. 86-04B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aOuseph,  Shoy.
■24510▼aSpacetime  Symmetries  from  Quantum  Ergodicity
■260    ▼a[Sl]▼bPurdue  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a211  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-04,  Section:  B.
■500    ▼aAdvisor:  Lashkari,  Nima.
■5021  ▼aThesis  (Ph.D.)--Purdue  University,  2024.
■520    ▼aIn  holographic  quantum  field  theories,  a  bulk  geometric  semiclassical  spacetime  emerges  from  strongly  coupled  interacting  conformal  field  theories  in  one  less  spatial  dimension.  This  is  the  celebrated  AdS/CFT  correspondence.  The  entanglement  entropy  of  a  boundary  spatial  subregion  can  be  calculated  as  the  area  of  a  codimension  two  bulk  surface  homologous  to  the  boundary  subregion  known  as  the  RT  surface.  The  bulk  region  contained  within  the  RT  surface  is  known  as  the  entanglement  wedge  and  bulk  reconstruction  tells  us  that  any  operator  in  the  entanglement  wedge  can  be  reconstructed  as  a  non-local  operator  on  the  corresponding  boundary  subregion.  This  notion  that  entanglement  creates  geometry  is  dubbed  "ER=EPR''  and  has  been  the  driving  force  behind  recent  progress  in  quantum  gravity  research.  In  this  thesis,  we  put  together  two  results  that  use  Tomita-Takesaki  modular  theory  and  quantum  ergodic  theory  to  make  progress  on  contemporary  problems  in  quantum  gravity.A  version  of  the  black  hole  information  loss  paradox  is  the  inconsistency  between  the  decay  of  two-point  functions  of  probe  operators  in  large  AdS  black  holes  and  the  dual  boundary  CFT  calculation  where  it  is  an  almost  periodic  function  of  time.  We  show  that  any  von  Neumann  algebra  in  a  faithful  normal  state  that  is  quantum  strong  mixing  (two-point  functions  decay)  with  respect  to  its  modular  flow  is  a  type  III  1  factor  and  the  state  has  a  trivial  centralizer.  In  particular,  for  Generalized  Free  Fields  (GFF)  in  a  thermofield  double  (KMS)  state,  we  show  that  if  the  two-point  functions  are  strong  mixing,  then  the  entire  algebra  is  strong  mixing  and  a  type  III  1factor  settling  a  recent  conjecture  of  Liu  and  Leutheusser.The  semiclassical  bulk  geometry  that  emerges  in  the  holographic  description  is  a  pseudo-Riemannian  manifold  and  we  expect  a  local  approximate  Poincare  algebra.  Near  a  bifurcate  Killing  horizon,  such  a  local  two-dimensional  Poincare  algebra  is  generated  by  the  Killing  flow  and  the  outward  null  translations  along  the  horizon.  We  show  the  emergence  of  such  a  Poincare  algebra  in  any  quantum  system  with  modular  future  and  past  subalgebras  in  a  limit  analogous  to  the  near-horizon  limit.  These  are  known  as  quantum  K-systems  and  they  saturate  the  modular  chaos  bound.  We  also  prove  that  the  existence  of  (modular)  future/past  von  Neumann  subalgebras  also  implies  a  second  law  of  (modular)  thermodynamics.
■590    ▼aSchool  code:  0183.
■650  4▼aThermodynamics
■650  4▼aGases
■650  4▼aBlack  holes
■650  4▼aHilbert  space
■650  4▼aPhase  transitions
■650  4▼aMathematical  functions
■650  4▼aSpacetime
■650  4▼aProbability
■650  4▼aAlgebra
■650  4▼aMechanics
■650  4▼aDynamical  systems
■650  4▼aProbability  distribution
■650  4▼aOrdinary  differential  equations
■650  4▼aAstronomy
■650  4▼aAstrophysics
■650  4▼aMathematics
■650  4▼aStatistics
■650  4▼aTheoretical  physics
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■690    ▼a0606
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■690    ▼a0405
■690    ▼a0463
■690    ▼a0753
■71020▼aPurdue  University.
■7730  ▼tDissertations  Abstracts  International▼g86-04B.
■790    ▼a0183
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17161533▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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