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Non-Perturbative Approaches to Strongly-Coupled Gauge Theory
Non-Perturbative Approaches to Strongly-Coupled Gauge Theory
Non-Perturbative Approaches to Strongly-Coupled Gauge Theory

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105115
ISBN  
9798293899647
DDC  
593.7
저자명  
Dempsey, Stephen Ross.
서명/저자  
Non-Perturbative Approaches to Strongly-Coupled Gauge Theory
발행사항  
[Sl] : Princeton University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
284 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Pufu, Silviu.
학위논문주기  
Thesis (Ph.D.)--Princeton University, 2025.
초록/해제  
요약The Standard Model of particle physics includes quantum chromodynamics, which is a non-abelian gauge theory. Such theories are known to be strongly coupled in the infrared limit. Thus, understanding the particles we observe in nature requires non-perturbative techniques for calculating observables in strongly-coupled gauge theories. This thesis explores three such techniques.The first, discretized lightcone quantization, has been employed for many decades to study gauge theories in 1 + 1 dimensions. In Chapter 2, we study adjoint QCD2 with Nc colors using this technique, first in the Nc → ∞ limit and then at finite Nc. We focus in particular on the affine symmetry algebra preserved even in the discretized theory, and use it to demonstrate that probe quarks are deconfined in the presence of massless adjoint fermions.The second, Hamiltonian lattice gauge theory, also has a decades-long history. In Chapter 3, we show that it can be made dramatically more accurate for U(1) gauge theory by using a mass shift prescription that restores a form of the anomalous chiral symmetry on the lattice. We then show how to construct a Hamiltonian lattice formulation of adjoint QCD2, obtaining results that agree with those in Chapter 2 and go further.The third, the (super)conformal bootstrap, is a modern approach for placing bounds on field theories using convex optimization. In Chapter 4, we first show how to augment the bootstrap to include integral constraints on four-point correlators derived from supersymmetric localization. By applying this technique to N = 4 super-Yang-Mills theory, we are able to find bounds on scaling dimensions and operator product expansion coefficients that are sensitive to the Yang-Mills coupling, providing a non-perturbative completion of known weak-coupling and strong-coupling limits. We then apply similar methods to the three-dimensional N = 8 theory of Aharony, Bergman, Jafferis, and Maldacena, obtaining very precise bounds that come with implications for M-theory.
일반주제명  
Particle physics
일반주제명  
Quantum physics
일반주제명  
Theoretical physics
일반주제명  
Computational physics
키워드  
Gauge theory
키워드  
Quantum field theory
키워드  
Supersymmetry
키워드  
M-theory
키워드  
Hamiltonian lattice gauge theory
기타저자  
Princeton University Physics
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aDempsey,  Stephen  Ross.▼0(orcid)0000-0002-0881-8814
■24510▼aNon-Perturbative  Approaches  to  Strongly-Coupled  Gauge  Theory
■260    ▼a[Sl]▼bPrinceton  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a284  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Pufu,  Silviu.
■5021  ▼aThesis  (Ph.D.)--Princeton  University,  2025.
■520    ▼aThe  Standard  Model  of  particle  physics  includes  quantum  chromodynamics,  which  is  a  non-abelian  gauge  theory.  Such  theories  are  known  to  be  strongly  coupled  in  the  infrared  limit.  Thus,  understanding  the  particles  we  observe  in  nature  requires  non-perturbative  techniques  for  calculating  observables  in  strongly-coupled  gauge  theories.  This  thesis  explores  three  such  techniques.The  first,  discretized  lightcone  quantization,  has  been  employed  for  many  decades  to  study  gauge  theories  in  1  +  1  dimensions.  In  Chapter  2,  we  study  adjoint  QCD2  with  Nc  colors  using  this  technique,  first  in  the  Nc  →  ∞  limit  and  then  at  finite  Nc.  We  focus  in  particular  on  the  affine  symmetry  algebra  preserved  even  in  the  discretized  theory,  and  use  it  to  demonstrate  that  probe  quarks  are  deconfined  in  the  presence  of  massless  adjoint  fermions.The  second,  Hamiltonian  lattice  gauge  theory,  also  has  a  decades-long  history.  In  Chapter  3,  we  show  that  it  can  be  made  dramatically  more  accurate  for  U(1)  gauge  theory  by  using  a  mass  shift  prescription  that  restores  a  form  of  the  anomalous  chiral  symmetry  on  the  lattice.  We  then  show  how  to  construct  a  Hamiltonian  lattice  formulation  of  adjoint  QCD2,  obtaining  results  that  agree  with  those  in  Chapter  2  and  go  further.The  third,  the  (super)conformal  bootstrap,  is  a  modern  approach  for  placing  bounds  on  field  theories  using  convex  optimization.  In  Chapter  4,  we  first  show  how  to  augment  the  bootstrap  to  include  integral  constraints  on  four-point  correlators  derived  from  supersymmetric  localization.  By  applying  this  technique  to  N  =  4  super-Yang-Mills  theory,  we  are  able  to  find  bounds  on  scaling  dimensions  and  operator  product  expansion  coefficients  that  are  sensitive  to  the  Yang-Mills  coupling,  providing  a  non-perturbative  completion  of  known  weak-coupling  and  strong-coupling  limits.  We  then  apply  similar  methods  to  the  three-dimensional  N  =  8  theory  of  Aharony,  Bergman,  Jafferis,  and  Maldacena,  obtaining  very  precise  bounds  that  come  with  implications  for  M-theory. 
■590    ▼aSchool  code:  0181.
■650  4▼aParticle  physics
■650  4▼aQuantum  physics
■650  4▼aTheoretical  physics
■650  4▼aComputational  physics
■653    ▼aGauge  theory
■653    ▼aQuantum  field  theory
■653    ▼aSupersymmetry
■653    ▼aM-theory
■653    ▼aHamiltonian  lattice  gauge  theory
■690    ▼a0798
■690    ▼a0599
■690    ▼a0753
■690    ▼a0216
■71020▼aPrinceton  University▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0181
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359411▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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