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Second-Order Perturbative Correction to State-Specific, Excited-State Mean Field Theory- [electronic resource]
Second-Order Perturbative Correction to State-Specific, Excited-State Mean Field Theory - ...
Second-Order Perturbative Correction to State-Specific, Excited-State Mean Field Theory- [electronic resource]

Detailed Information

자료유형  
 학위논문파일 국외
최종처리일시  
20240214100444
ISBN  
9798380111508
DDC  
542
저자명  
Clune, Rachel A.
서명/저자  
Second-Order Perturbative Correction to State-Specific, Excited-State Mean Field Theory - [electronic resource]
발행사항  
[S.l.]: : University of California, Berkeley., 2023
발행사항  
Ann Arbor : : ProQuest Dissertations & Theses,, 2023
형태사항  
1 online resource(166 p.)
주기사항  
Source: Dissertations Abstracts International, Volume: 85-02, Section: B.
주기사항  
Advisor: Neuscamman, Eric.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2023.
사용제한주기  
This item must not be sold to any third party vendors.
초록/해제  
요약Obtaining predictions for the energies of electronic excited states, especially charge transfer states, is still a challenge in the field of electronic structure theory. Charge transfer states often play an important role in the function of solar cells and organic semiconductors, and having an accurate computational model for their energetics that is not computationally expensive is crucial for the development of new technologies that rely on the existence of these states. In this dissertation, two contributions towards this goal are discussed. First, the formulation of a state-specific perturbative method with a relatively low computational complexity of O(N5) is described. The approximations made to reduce the scaling from its original complexity of O(N7) had very little impact on the results of the method and it was shown that it provided accurate energetic predictions for valence and charge transfer excitations of small molecules. Next, this perturbative method was analyzed for its accuracy using a benchmarking set of 105 singlet valence excited states. Through this study it was found that, with regularization, the method can perform even better than many higher-scaling theories and can provide a warning for when a state being studied cannot be mainly described by single excitations. The demonstrated accuracy of the method combined with its relatively low computational cost makes it a promising theory that will be useful in its own right and which can act as a springboard for the development of even more sophisticated excited-state-specific correlation methods.
일반주제명  
Computational chemistry.
일반주제명  
Chemistry.
일반주제명  
Physical chemistry.
키워드  
Benchmarking
키워드  
Electronic structure
키워드  
Perturbation theory
키워드  
Electronic
키워드  
Charge transfer
기타저자  
University of California, Berkeley Chemistry
기본자료저록  
Dissertations Abstracts International. 85-02B.
기본자료저록  
Dissertation Abstract International
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI30491576
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a542
■1001  ▼aClune,  Rachel  A.
■24510▼aSecond-Order  Perturbative  Correction  to  State-Specific,  Excited-State  Mean  Field  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(166  p.)
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  85-02,  Section:  B.
■500    ▼aAdvisor:  Neuscamman,  Eric.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2023.
■506    ▼aThis  item  must  not  be  sold  to  any  third  party  vendors.
■520    ▼aObtaining  predictions  for  the  energies  of  electronic  excited  states,  especially  charge  transfer  states,  is  still  a  challenge  in  the  field  of  electronic  structure  theory.  Charge  transfer  states  often  play  an  important  role  in  the  function  of  solar  cells  and  organic  semiconductors,  and  having  an  accurate  computational  model  for  their  energetics  that  is  not  computationally  expensive  is  crucial  for  the  development  of  new  technologies  that  rely  on  the  existence  of  these  states.  In  this  dissertation,  two  contributions  towards  this  goal  are  discussed.  First,  the  formulation  of  a  state-specific  perturbative  method  with  a  relatively  low  computational  complexity  of  O(N5)  is  described.  The  approximations  made  to  reduce  the  scaling  from  its  original  complexity  of  O(N7)  had  very  little  impact  on  the  results  of  the  method  and  it  was  shown  that  it  provided  accurate  energetic  predictions  for  valence  and  charge  transfer  excitations  of  small  molecules.  Next,  this  perturbative  method  was  analyzed  for  its  accuracy  using  a  benchmarking  set  of  105  singlet  valence  excited  states.  Through  this  study  it  was  found  that,  with  regularization,  the  method  can  perform  even  better  than  many  higher-scaling  theories  and  can  provide  a  warning  for  when  a  state  being  studied  cannot  be  mainly  described  by  single  excitations.  The  demonstrated  accuracy  of  the  method  combined  with  its  relatively  low  computational  cost  makes  it  a  promising  theory  that  will  be  useful  in  its  own  right  and  which  can  act  as  a  springboard  for  the  development  of  even  more  sophisticated  excited-state-specific  correlation  methods.
■590    ▼aSchool  code:  0028.
■650  4▼aComputational  chemistry.
■650  4▼aChemistry.
■650  4▼aPhysical  chemistry.
■653    ▼aBenchmarking
■653    ▼aElectronic  structure
■653    ▼aPerturbation  theory
■653    ▼aElectronic
■653    ▼aCharge  transfer
■690    ▼a0219
■690    ▼a0485
■690    ▼a0494
■71020▼aUniversity  of  California,  Berkeley▼bChemistry.
■7730  ▼tDissertations  Abstracts  International▼g85-02B.
■773    ▼tDissertation  Abstract  International
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T16932332▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.
■980    ▼a202402▼f2024

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