본문

서브메뉴

Theory and Computation of Wasserstein Geometric Flows with Application to Time-Dependent Schrodinger Equation
Theory and Computation of Wasserstein Geometric Flows with Application to Time-Dependent S...
Theory and Computation of Wasserstein Geometric Flows with Application to Time-Dependent Schrodinger Equation

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260209102913
ISBN  
9798265406620
DDC  
530
저자명  
Wu, Hao.
서명/저자  
Theory and Computation of Wasserstein Geometric Flows with Application to Time-Dependent Schrodinger Equation
발행사항  
[Sl] : Georgia Institute of Technology, 2023
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2023
형태사항  
112 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Zhou, Haomin.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2023.
초록/해제  
요약This dissertation focuses on the systematic study of a novel computational framework to solve Wasserstein geometric flows. In particular, two important classes of such flows, Wasserstein gradient flows (WGFs) and Wasserstein Hamiltonian flows (WHFs), are the main examples used throughout this research-they have many applications in real-world physics systems and more recently in deep learning problems such as generative models. Wasserstein geometric flows describe time evolution of probability density functions on the infinite-dimensional Wasserstein manifold. Therefore, it is critical to develop fast, accurate, and scalable numerical schemes to solves these flows.The main feature of our computational framework is to use general reduced-order models, such as deep neural networks, to parameterize the push-forward maps such that they can push a simple reference density to the ones solving WGFs or WHFs. This approach essentially reduces these flows defined on infinite-dimensional Wasserstein mainfold to finite-dimensional dynamical systems of the parameters of reduced-order models. These new dynamical systems are parameterizations of the WGFs and WHFs, which we call PWGFs and PWHFs for short, and are defined on the finite-dimensional parameter space. By leveraging a pullback Wasserstein metric on the parameter space, we can develop effective numerical methods to approximate the solutions of these flows.For WGFs, we show that our proposed PWGF scheme can be applied to general linear, nonlinear, interactive functionals or a combination of them defined on Wasserstein manifolds. Moreover, our scheme does not require any spatial discretization and thus is scalable to cases where the space dimensions of the problems are high. Our approach does not need to solve any nonconvex optimization problems but only require solving standard least squares problems in each time step. With these features, PWGF demonstrates promising computational efficiency and accuracy on a variety of WGF examples, as shown in our numerical experiments. A comprehensive analysis of the approximation errors using PWGFis also provided in this work, which lays the foundation theoretically.For WHFs, we adopt the similar idea but apply it to the more challenging Hamiltonian systems on Wasserstein manifolds. We propose a proper way to parameterize the adjoint variable in the parameter space. To preserve the Hamiltonian, we employ a sympletic numerical scheme to solve the PWHF, where a fixed-point iteration scheme is used to solve the implicit update equation of the model parameters. Similar to PWGF, PWHF does not require solving nonconvex optimization problems and thus avoids all issues of existing nonconvex optimization algorithms. We present the connection between the Lagrangian and Eulerian perspectives of the original flows using PWHF. Approximation error analysis and a number of numerical examples are provided using PWHF. Furthermore, we consider the Schrodinger equations (SEs) as operator evolution equations, and show how to use 짢 PWHF to solve them. Numerical results are also provided to demonstrate its promising performance in solving SEs where the state spaces are of high dimension.
일반주제명  
Schrodinger equation
일반주제명  
Error analysis
일반주제명  
Dynamical systems
일반주제명  
Ordinary differential equations
일반주제명  
Neural networks
일반주제명  
Mathematics
일반주제명  
Theoretical physics
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

 008260203s2023        us                              c    eng  d
■001000017366007
■00520260209102913
■006m          o    d                
■007cr#unu||||||||
■020    ▼a9798265406620
■035    ▼a(MiAaPQ)AAI32316164
■035    ▼a(MiAaPQ)GeorgiaTech72711
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aWu,  Hao.
■24510▼aTheory  and  Computation  of  Wasserstein  Geometric  Flows  with  Application  to  Time-Dependent  Schrodinger  Equation
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2023
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2023
■300    ▼a112  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Zhou,  Haomin.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2023.
■520    ▼aThis  dissertation  focuses  on  the  systematic  study  of  a  novel  computational  framework  to  solve  Wasserstein  geometric  flows.  In  particular,  two  important  classes  of  such  flows,  Wasserstein  gradient  flows  (WGFs)  and  Wasserstein  Hamiltonian  flows  (WHFs),  are  the  main  examples  used  throughout  this  research-they  have  many  applications  in  real-world  physics  systems  and  more  recently  in  deep  learning  problems  such  as  generative  models.  Wasserstein  geometric  flows  describe  time  evolution  of  probability  density  functions  on  the  infinite-dimensional  Wasserstein  manifold.  Therefore,  it  is  critical  to  develop  fast,  accurate,  and  scalable  numerical  schemes  to  solves  these  flows.The  main  feature  of  our  computational  framework  is  to  use  general  reduced-order  models,  such  as  deep  neural  networks,  to  parameterize  the  push-forward  maps  such  that  they  can  push  a  simple  reference  density  to  the  ones  solving  WGFs  or  WHFs.  This  approach  essentially  reduces  these  flows  defined  on  infinite-dimensional  Wasserstein  mainfold  to  finite-dimensional  dynamical  systems  of  the  parameters  of  reduced-order  models.  These  new  dynamical  systems  are  parameterizations  of  the  WGFs  and  WHFs,  which  we  call  PWGFs  and  PWHFs  for  short,  and  are  defined  on  the  finite-dimensional  parameter  space.  By  leveraging  a  pullback  Wasserstein  metric  on  the  parameter  space,  we  can  develop  effective  numerical  methods  to  approximate  the  solutions  of  these  flows.For  WGFs,  we  show  that  our  proposed  PWGF  scheme  can  be  applied  to  general  linear,  nonlinear,  interactive  functionals  or  a  combination  of  them  defined  on  Wasserstein  manifolds.  Moreover,  our  scheme  does  not  require  any  spatial  discretization  and  thus  is  scalable  to  cases  where  the  space  dimensions  of  the  problems  are  high.  Our  approach  does  not  need  to  solve  any  nonconvex  optimization  problems  but  only  require  solving  standard  least  squares  problems  in  each  time  step.  With  these  features,  PWGF  demonstrates  promising  computational  efficiency  and  accuracy  on  a  variety  of  WGF  examples,  as  shown  in  our  numerical  experiments.  A  comprehensive  analysis  of  the  approximation  errors  using  PWGFis  also  provided  in  this  work,  which  lays  the  foundation  theoretically.For  WHFs,  we  adopt  the  similar  idea  but  apply  it  to  the  more  challenging  Hamiltonian  systems  on  Wasserstein  manifolds.  We  propose  a  proper  way  to  parameterize  the  adjoint  variable  in  the  parameter  space.  To  preserve  the  Hamiltonian,  we  employ  a  sympletic  numerical  scheme  to  solve  the  PWHF,  where  a  fixed-point  iteration  scheme  is  used  to  solve  the  implicit  update  equation  of  the  model  parameters.  Similar  to  PWGF,  PWHF  does  not  require  solving  nonconvex  optimization  problems  and  thus  avoids  all  issues  of  existing  nonconvex  optimization  algorithms.  We  present  the  connection  between  the  Lagrangian  and  Eulerian  perspectives  of  the  original  flows  using  PWHF.  Approximation  error  analysis  and  a  number  of  numerical  examples  are  provided  using  PWHF.  Furthermore,  we  consider  the  Schrodinger  equations  (SEs)  as  operator  evolution  equations,  and  show  how  to  use  짢  PWHF  to  solve  them.  Numerical  results  are  also  provided  to  demonstrate  its  promising  performance  in  solving  SEs  where  the  state  spaces  are  of  high  dimension.
■590    ▼aSchool  code:  0078.
■650  4▼aSchrodinger  equation
■650  4▼aError  analysis
■650  4▼aDynamical  systems
■650  4▼aOrdinary  differential  equations
■650  4▼aNeural  networks
■650  4▼aMathematics
■650  4▼aTheoretical  physics
■690    ▼a0800
■690    ▼a0405
■690    ▼a0753
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2023
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17366007▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

미리보기

내보내기

chatGPT토론

Ai 추천 관련 도서


    신착도서 더보기
    최근 3년간 통계입니다.

    소장정보

    • 예약
    • 소재불명신고
    • 나의폴더
    • 우선정리요청
    • 비도서대출신청
    • 야간 도서대출신청
    소장자료
    등록번호 청구기호 소장처 대출가능여부 대출정보
    TF16765 전자도서 대출가능 마이폴더 부재도서신고 비도서대출신청 야간 도서대출신청

    * 대출중인 자료에 한하여 예약이 가능합니다. 예약을 원하시면 예약버튼을 클릭하십시오.

    해당 도서를 다른 이용자가 함께 대출한 도서

    관련 인기도서

    로그인 후 이용 가능합니다.