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Higher Accuracy, Lower Cost: Developments in Molecular and Periodic Electronic Structure Theory- [electronic resource]
Higher Accuracy, Lower Cost: Developments in Molecular and Periodic Electronic Structure Theory- [electronic resource]

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자료유형  
 학위논문
Control Number  
0016932256
International Standard Book Number  
9798380380942
Dewey Decimal Classification Number  
542
Main Entry-Personal Name  
Rettig, Adam.
Publication, Distribution, etc. (Imprint  
[S.l.] : University of California, Berkeley., 2023
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2023
Physical Description  
1 online resource(168 p.)
General Note  
Source: Dissertations Abstracts International, Volume: 85-03, Section: B.
General Note  
Advisor: Head-Gordon, Martin.
Dissertation Note  
Thesis (Ph.D.)--University of California, Berkeley, 2023.
Restrictions on Access Note  
This item must not be sold to any third party vendors.
Summary, Etc.  
요약Proper applications of electronic structure theory use the most accurate computational method that is feasible for the system size of interest. Modern electronic structure theory methods therefore seek to maximize the ratio of accuracy to computation time. To improve upon an existing method, one must therefore either increase the accuracy or lower the computational cost. In this work, we present techniques for both. In Chapter 2, we present a study of regularized orbital optimized second order Moller-Plesset theory (OOMP2) and provide an analysis of appropriate empirical parameters across a broad spectrum of chemical systems - yielding a factor of 9 reduction in error over unregularized OOMP2 for certain classes of problems! In Chapter 3, we present a new algorithm utilizing tensor hypercontraction to compute exact exchange for periodic systems including k-point sampling; this approach significantly reduces the computation time and memory usage for hybrid density functional theory (DFT) when large k-point meshes are used. In Chapter 4, we analyze the effect of orbitals in third order Moller-Plesset theory (MP3), showing that DFT orbitals can yield a factor of 3 reduction in error over the more traditional Hartree-Fock orbitals for many applications at no extra computational cost. Finally, in Chapter 5 we utilize MP3 with DFT orbitals to compute reaction energies and reaction rate constants for an experimentally observed reaction and use these to predict the product, which the experiment could only characterize by molecular weight.
Subject Added Entry-Topical Term  
Computational chemistry.
Subject Added Entry-Topical Term  
Chemistry.
Subject Added Entry-Topical Term  
Molecular chemistry.
Index Term-Uncontrolled  
Density functional theory
Index Term-Uncontrolled  
Electronic structure
Index Term-Uncontrolled  
Quantum chemistry
Index Term-Uncontrolled  
Molecular weight
Added Entry-Corporate Name  
University of California, Berkeley Chemistry
Host Item Entry  
Dissertations Abstracts International. 85-03B.
Host Item Entry  
Dissertation Abstract International
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:639331

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a542
■1001  ▼aRettig,  Adam.
■24510▼aHigher  Accuracy,  Lower  Cost:  Developments  in  Molecular  and  Periodic  Electronic  Structure  Theory▼h[electronic  resource]
■260    ▼a[S.l.]▼bUniversity  of  California,  Berkeley.  ▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a1  online  resource(168  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-03,  Section:  B.
■500    ▼aAdvisor:  Head-Gordon,  Martin.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aProper  applications  of  electronic  structure  theory  use  the  most  accurate  computational  method  that  is  feasible  for  the  system  size  of  interest.  Modern  electronic  structure  theory  methods  therefore  seek  to  maximize  the  ratio  of  accuracy  to  computation  time.  To  improve  upon  an  existing  method,  one  must  therefore  either  increase  the  accuracy  or  lower  the  computational  cost.  In  this  work,  we  present  techniques  for  both.  In  Chapter  2,  we  present  a  study  of  regularized  orbital  optimized  second  order  Moller-Plesset  theory  (OOMP2)  and  provide  an  analysis  of  appropriate  empirical  parameters  across  a  broad  spectrum  of  chemical  systems  -  yielding  a  factor  of  9  reduction  in  error  over  unregularized  OOMP2  for  certain  classes  of  problems!  In  Chapter  3,  we  present  a  new  algorithm  utilizing  tensor  hypercontraction  to  compute  exact  exchange  for  periodic  systems  including  k-point  sampling;  this  approach  significantly  reduces  the  computation  time  and  memory  usage  for  hybrid  density  functional  theory  (DFT)  when  large  k-point  meshes  are  used.  In  Chapter  4,  we  analyze  the  effect  of  orbitals  in  third  order  Moller-Plesset  theory  (MP3),  showing  that  DFT  orbitals  can  yield  a  factor  of  3  reduction  in  error  over  the  more  traditional  Hartree-Fock  orbitals  for  many  applications  at  no  extra  computational  cost.  Finally,  in  Chapter  5  we  utilize  MP3  with  DFT  orbitals  to  compute  reaction  energies  and  reaction  rate  constants  for  an  experimentally  observed  reaction  and  use  these  to  predict  the  product,  which  the  experiment  could  only  characterize  by  molecular  weight.
■590    ▼aSchool  code:  0028.
■650  4▼aComputational  chemistry.
■650  4▼aChemistry.
■650  4▼aMolecular  chemistry.
■653    ▼aDensity  functional  theory
■653    ▼aElectronic  structure
■653    ▼aQuantum  chemistry
■653    ▼aMolecular  weight
■690    ▼a0219
■690    ▼a0431
■690    ▼a0485
■71020▼aUniversity  of  California,  Berkeley▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g85-03B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932256▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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