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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]
상세정보
- 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
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■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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