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Topics in Sigma Models with Inhomogeneous Target Spaces
Topics in Sigma Models with Inhomogeneous Target Spaces
Topics in Sigma Models with Inhomogeneous Target Spaces

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20250211152735
ISBN  
9798384095385
DDC  
530
저자명  
Sheu, Chao-Hsiang.
서명/저자  
Topics in Sigma Models with Inhomogeneous Target Spaces
발행사항  
[Sl] : University of Minnesota, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
143 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
주기사항  
Advisor: Shifman, Mikhail.
학위논문주기  
Thesis (Ph.D.)--University of Minnesota, 2024.
초록/해제  
요약Sigma models with inhomogeneous target manifolds exhibit richer structures in many perspectives compared to traditional models with homogeneous spaces. The more complex geometric structures lead to additional features and anomalies as quantum corrections are considered. Moreover, the associated theory in the infrared, under renormalization group flows, can be notably non-trivial. In this thesis, we present a thorough investigation of two sigma models within this category.We begin with a classic example, the weighted projective model WCPP(N, N), which is well-studied in the physics and mathematics literature. Our investigation focuses on the geometry and related quantum effects of the N=(0,2) supersymmetrized version of the weighted projective model. The quantum modifications induce an emergent structure that contrasts with the standard cases of homogeneous spaces, where corrections are proportional to the metric tensor and only governed by the renormalization of the coupling constant. In addition, due to the existence of two equivalent formulations of the present model, we identify an apparent mismatch in the predicted infrared behavior. This issue is resolved by numerically studying the corresponding renormalization group flow with the exact twisted superpotential. The results show that both models flow to a non-trivial conifold.Then we focus on the Lie-algebraically deformed sigma models. This class of models is derived by deforming the principal chiral models along specific directions associated with a subset of su(2) Lie algebra generators. We examine both the supersymmetric and non-supersymmetric versions of this model. Additionally, we reveal the quasi-exact solvability of the associated quantum mechanics under a particular compactification scheme.Lastly, we address the renormalon ambiguity in the supersymmetric O(N) model. We compute all-order contributions in the coupling constants up to the next-to-leading order in large N. Our results demonstrate that the ambiguities arising from coefficient functions cancel with those from condensates. This cancellation not only links the perturbative data with the non-perturbative data but also confirms the consistency of the theory.
일반주제명  
Physics
일반주제명  
Astrophysics
키워드  
Sigma models
키워드  
Supersymmetry
키워드  
Inhomogeneous target spaces
기타저자  
University of Minnesota Physics
기본자료저록  
Dissertations Abstracts International. 86-03B.
전자적 위치 및 접속  
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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aSheu,  Chao-Hsiang.
■24510▼aTopics  in  Sigma  Models  with  Inhomogeneous  Target  Spaces
■260    ▼a[Sl]▼bUniversity  of  Minnesota▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a143  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Shifman,  Mikhail.
■5021  ▼aThesis  (Ph.D.)--University  of  Minnesota,  2024.
■520    ▼aSigma  models  with  inhomogeneous  target  manifolds  exhibit  richer  structures  in  many  perspectives  compared  to  traditional  models  with  homogeneous  spaces.  The  more  complex  geometric  structures  lead  to  additional  features  and  anomalies  as  quantum  corrections  are  considered.  Moreover,  the  associated  theory  in  the  infrared,  under  renormalization  group  flows,  can  be  notably  non-trivial.  In  this  thesis,  we  present  a  thorough  investigation  of  two  sigma  models  within  this  category.We  begin  with  a  classic  example,  the  weighted  projective  model  WCPP(N,  N),  which  is  well-studied  in  the  physics  and  mathematics  literature.  Our  investigation  focuses  on  the  geometry  and  related  quantum  effects  of  the  N=(0,2)  supersymmetrized  version  of  the  weighted  projective  model.  The  quantum  modifications  induce  an  emergent  structure  that  contrasts  with  the  standard  cases  of  homogeneous  spaces,  where  corrections  are  proportional  to  the  metric  tensor  and  only  governed  by  the  renormalization  of  the  coupling  constant.  In  addition,  due  to  the  existence  of  two  equivalent  formulations  of  the  present  model,  we  identify  an  apparent  mismatch  in  the  predicted  infrared  behavior.  This  issue  is  resolved  by  numerically  studying  the  corresponding  renormalization  group  flow  with  the  exact  twisted  superpotential.  The  results  show  that  both  models  flow  to  a  non-trivial  conifold.Then  we  focus  on  the  Lie-algebraically  deformed  sigma  models.  This  class  of  models  is  derived  by  deforming  the  principal  chiral  models  along  specific  directions  associated  with  a  subset  of  su(2)  Lie  algebra  generators.  We  examine  both  the  supersymmetric  and  non-supersymmetric  versions  of  this  model.  Additionally,  we  reveal  the  quasi-exact  solvability  of  the  associated  quantum  mechanics  under  a  particular  compactification  scheme.Lastly,  we  address  the  renormalon  ambiguity  in  the  supersymmetric  O(N)  model.  We  compute  all-order  contributions  in  the  coupling  constants  up  to  the  next-to-leading  order  in  large  N.  Our  results  demonstrate  that  the  ambiguities  arising  from  coefficient  functions  cancel  with  those  from  condensates.  This  cancellation  not  only  links  the  perturbative  data  with  the  non-perturbative  data  but  also  confirms  the  consistency  of  the  theory.
■590    ▼aSchool  code:  0130.
■650  4▼aPhysics
■650  4▼aAstrophysics
■653    ▼aSigma  models
■653    ▼aSupersymmetry
■653    ▼aInhomogeneous  target  spaces
■690    ▼a0605
■690    ▼a0596
■71020▼aUniversity  of  Minnesota▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0130
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163647▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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