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Numerical Studies in Lattice QCD
Numerical Studies in Lattice QCD
Numerical Studies in Lattice QCD

Detailed Information

Material Type  
 단행본
 
0017165189
Date and Time of Latest Transaction  
20250211153146
ISBN  
9798346378457
DDC  
519.5
Author  
Godzieba, Daniel A.
Title/Author  
Numerical Studies in Lattice QCD
Publish Info  
[Sl] : The Pennsylvania State University, 2024
Publish Info  
Ann Arbor : ProQuest Dissertations & Theses, 2024
Material Info  
104 p
General Note  
Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
General Note  
Advisor: Fodor, Zoltan.
학위논문주기  
Thesis (Ph.D.)--The Pennsylvania State University, 2024.
Abstracts/Etc  
요약Lattice field theory is a non-perturbative method of solving the equations of gauge theories in particle physics. It is a well-established method of exploring the phase diagram of quantum chromodynamics (QCD), the theory of the strong interaction. Numerical studies of lattice QCD on the computer are capable of yielding exact, non-perturbative results. However, regions of the QCD phase diagram pose great challenges for lattice QCD because of the difficulties which arise for numerical calculations. We present numerical studies directed towards eventually simulating in more difficult regions of the phase diagram.In the first study, we demonstrate the effectiveness of a generalization of the parallel tempering algorithm, originally developed for spin systems by Marinari and Parisi \\cite{Marinari:1992qd}, in mitigating the issue of supercritical slowing-down in lattice simulations in the vicinity of first-order phase transitions. We do so by performing large-scale simulations to characterize the phase transition of pure SU(3) Yang-Mills theory, or quenched QCD. We compare the autocorrelation times of parallel tempering simulations with those of brute force calculations. We compute the transition temperature to be _0T_c = 0.25384(25)$---which is the first per-mill accurate result in lattice QCD---and by a finite-volume scaling, we show that the transition is first-order.In the second study, we look further into the phase transition in pure SU(3) by studying its topological features. We consider the behavior of the kurtosis of the topological charge across the deconfinement transition, which is a quantity useful in determining the onset of the dilute instanton gas picture in the deconfined phase.In the final study, we investigate the renormalization of so-called minimally doubled fermions. The Karsten-Wilczek action is a implementation of minimally doubled fermions on the lattice. It explicitly breaks hypercubic symmetry and introduces three counterterms with respective bare parameters. We present a tuning of the bare parameters of the Karsten-Wilczek action on stored gauge configurations that were computed with the staggered fermion action at the physical point. We also study the magnitude of the taste-splitting of several fermion channels as a function of the lattice spacing.
Subject Added Entry-Topical Term  
Kurtosis
Subject Added Entry-Topical Term  
Quantum physics
Subject Added Entry-Topical Term  
Quarks
Subject Added Entry-Topical Term  
Fourier transforms
Subject Added Entry-Topical Term  
Neutron stars
Subject Added Entry-Topical Term  
Symmetry
Subject Added Entry-Topical Term  
Supercomputers
Subject Added Entry-Topical Term  
Lattice theory
Subject Added Entry-Topical Term  
Spacetime
Subject Added Entry-Topical Term  
Anisotropy
Subject Added Entry-Topical Term  
Quantum field theory
Subject Added Entry-Topical Term  
20th century
Subject Added Entry-Topical Term  
Atoms & subatomic particles
Subject Added Entry-Topical Term  
Particle physics
Subject Added Entry-Topical Term  
Asymmetry
Subject Added Entry-Topical Term  
Astronomy
Subject Added Entry-Topical Term  
Atomic physics
Subject Added Entry-Topical Term  
Mathematics
Subject Added Entry-Topical Term  
Theoretical physics
Added Entry-Corporate Name  
The Pennsylvania State University.
Host Item Entry  
Dissertations Abstracts International. 86-05B.
Electronic Location and Access  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aGodzieba,  Daniel  A.
■24510▼aNumerical  Studies  in  Lattice  QCD
■260    ▼a[Sl]▼bThe  Pennsylvania  State  University▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a104  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-05,  Section:  B.
■500    ▼aAdvisor:  Fodor,  Zoltan.
■5021  ▼aThesis  (Ph.D.)--The  Pennsylvania  State  University,  2024.
■520    ▼aLattice  field  theory  is  a  non-perturbative  method  of  solving  the  equations  of  gauge  theories  in  particle  physics.  It  is  a  well-established  method  of  exploring  the  phase  diagram  of  quantum  chromodynamics  (QCD),  the  theory  of  the  strong  interaction.  Numerical  studies  of  lattice  QCD  on  the  computer  are  capable  of  yielding  exact,  non-perturbative  results.  However,  regions  of  the  QCD  phase  diagram  pose  great  challenges  for  lattice  QCD  because  of  the  difficulties  which  arise  for  numerical  calculations.  We  present  numerical  studies  directed  towards  eventually  simulating  in  more  difficult  regions  of  the  phase  diagram.In  the  first  study,  we  demonstrate  the  effectiveness  of  a  generalization  of  the  parallel  tempering  algorithm,  originally  developed  for  spin  systems  by  Marinari  and  Parisi  \\cite{Marinari:1992qd},  in  mitigating  the  issue  of  supercritical  slowing-down  in  lattice  simulations  in  the  vicinity  of  first-order  phase  transitions.  We  do  so  by  performing  large-scale  simulations  to  characterize  the  phase  transition  of  pure  SU(3)  Yang-Mills  theory,  or  quenched  QCD.  We  compare  the  autocorrelation  times  of  parallel  tempering  simulations  with  those  of  brute  force  calculations.  We  compute  the  transition  temperature  to  be  ▼w_0T_c  =  0.25384(25)$---which  is  the  first  per-mill  accurate  result  in  lattice  QCD---and  by  a  finite-volume  scaling,  we  show  that  the  transition  is  first-order.In  the  second  study,  we  look  further  into  the  phase  transition  in  pure  SU(3)  by  studying  its  topological  features.  We  consider  the  behavior  of  the  kurtosis  of  the  topological  charge  across  the  deconfinement  transition,  which  is  a  quantity  useful  in  determining  the  onset  of  the  dilute  instanton  gas  picture  in  the  deconfined  phase.In  the  final  study,  we  investigate  the  renormalization  of  so-called  minimally  doubled  fermions.  The  Karsten-Wilczek  action  is  a  implementation  of  minimally  doubled  fermions  on  the  lattice.  It  explicitly  breaks  hypercubic  symmetry  and  introduces  three  counterterms  with  respective  bare  parameters.  We  present  a  tuning  of  the  bare  parameters  of  the  Karsten-Wilczek  action  on  stored  gauge  configurations  that  were  computed  with  the  staggered  fermion  action  at  the  physical  point.  We  also  study  the  magnitude  of  the  taste-splitting  of  several  fermion  channels  as  a  function  of  the  lattice  spacing.
■590    ▼aSchool  code:  0176.
■650  4▼aKurtosis
■650  4▼aQuantum  physics
■650  4▼aQuarks
■650  4▼aFourier  transforms
■650  4▼aNeutron  stars
■650  4▼aSymmetry
■650  4▼aSupercomputers
■650  4▼aLattice  theory
■650  4▼aSpacetime
■650  4▼aAnisotropy
■650  4▼aQuantum  field  theory
■650  4▼a20th  century
■650  4▼aAtoms  &  subatomic  particles
■650  4▼aParticle  physics
■650  4▼aAsymmetry
■650  4▼aAstronomy
■650  4▼aAtomic  physics
■650  4▼aMathematics
■650  4▼aTheoretical  physics
■690    ▼a0599
■690    ▼a0798
■690    ▼a0606
■690    ▼a0748
■690    ▼a0405
■690    ▼a0753
■71020▼aThe  Pennsylvania  State  University.
■7730  ▼tDissertations  Abstracts  International▼g86-05B.
■790    ▼a0176
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17165189▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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