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Differentiable Programming for Problems in Statistical Mechanics and Biophysics
Differentiable Programming for Problems in Statistical Mechanics and Biophysics
Differentiable Programming for Problems in Statistical Mechanics and Biophysics

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105146
ISBN  
9798265409409
DDC  
519
저자명  
Krueger, Ryan Kirkman.
서명/저자  
Differentiable Programming for Problems in Statistical Mechanics and Biophysics
발행사항  
[Sl] : Harvard University, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
372 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Brenner, Michael.
학위논문주기  
Thesis (Ph.D.)--Harvard University, 2025.
초록/해제  
요약This thesis explores how differentiable programming -- a paradigm that leverages automatic differentiation (AD) for scientific computing -- can be used to advance modeling and design in soft matter and biophysics. Traditional applied mathematics relies on hand-crafted models, approximations, and domain-specific numerics. However, recent advances in hardware acceleration and AD frameworks originally developed for deep learning have transformed the landscape of scientific computing, enabling exact and efficient computation of gradients in complex models. I demonstrate how this computational shift enables novel capabilities across several domains. I first show how AD enables otherwise intractable analytical calculations. Specifically, I use AD to efficiently evaluate partition functions and assembly yields in systems of anisotropically interacting particles. I then apply this framework to compare calculations under existing models of protein-protein interactions with experimentally-determined assembly yields of de novo proteins. Inspired by this example of poor model generalization, I then focus on AD as an optimization tool for physics-based models. I devise a framework for directly differentiating the aforementioned assembly yield calculation, allowing me to fit protein force fields to target assembly yields via gradient-based optimization. I then extend these techniques to thermodynamic models of nucleic acids, showing that parameters in the popular "nearest neighbor" model describing secondary structure thermodynamics can be fit to data via gradient descent, enhancing predictive power. I also apply differentiable molecular dynamics to design functional colloidal systems. For some physics-based calculations, direct differentiation for modeling or design is infeasible. One such cause is that a calculation is differentiable in principle but computationally prohibitive to unroll. In the face of this, I leverage and extend novel methods for stochastic gradient estimation to develop a framework for fitting coarse-grained force fields to experimental data. In the second limiting case, a calculation may be inherently discontinuous due to discrete control variables. One example of this is designing RNA sequences with respect to the aforementioned nearest neighbor model, for which I introduce an algorithm to compute the expected partition function over a probability distribution of RNA sequences, enabling gradient-based RNA design. Building on these advanced methods for stochastic gradient estimation and this probabilistic sequence representation, I develop a general method for inverse design in molecular simulations by introducing a notion of expected Hamiltonians. I demonstrate how this enables the rational design of intrinsically disordered proteins, DNA sequences, and even improved particle linking algorithms. I conclude with a forward-looking perspective on promising applications of these methods, opportunities for future methods development, and proposed directions for novel interfaces between computation, mathematics, and physics.
일반주제명  
Applied mathematics
일반주제명  
Biophysics
일반주제명  
Statistical physics
키워드  
Differentiable programming
키워드  
Protein
키워드  
Automatic differentiation
키워드  
Soft matter
키워드  
Statistical mechanics
기타저자  
Harvard University Engineering and Applied Sciences - Applied Math
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
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MARC

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■020    ▼a9798265409409
■035    ▼a(MiAaPQ)AAI32241210
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a519
■1001  ▼aKrueger,  Ryan  Kirkman.
■24510▼aDifferentiable  Programming  for  Problems  in  Statistical  Mechanics  and  Biophysics
■260    ▼a[Sl]▼bHarvard  University▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a372  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Brenner,  Michael.
■5021  ▼aThesis  (Ph.D.)--Harvard  University,  2025.
■520    ▼aThis  thesis  explores  how  differentiable  programming  --  a  paradigm  that  leverages  automatic  differentiation  (AD)  for  scientific  computing  --  can  be  used  to  advance  modeling  and  design  in  soft  matter  and  biophysics.  Traditional  applied  mathematics  relies  on  hand-crafted  models,  approximations,  and  domain-specific  numerics.  However,  recent  advances  in  hardware  acceleration  and  AD  frameworks  originally  developed  for  deep  learning  have  transformed  the  landscape  of  scientific  computing,  enabling  exact  and  efficient  computation  of  gradients  in  complex  models.            I  demonstrate  how  this  computational  shift  enables  novel  capabilities  across  several  domains.  I  first  show  how  AD  enables  otherwise  intractable  analytical  calculations.  Specifically,  I  use  AD  to  efficiently  evaluate  partition  functions  and  assembly  yields  in  systems  of  anisotropically  interacting  particles.  I  then  apply  this  framework  to  compare  calculations  under  existing  models  of  protein-protein  interactions  with  experimentally-determined  assembly  yields  of  de  novo  proteins.  Inspired  by  this  example  of  poor  model  generalization,  I  then  focus  on  AD  as  an  optimization  tool  for  physics-based  models.  I  devise  a  framework  for  directly  differentiating  the  aforementioned  assembly  yield  calculation,  allowing  me  to  fit  protein  force  fields  to  target  assembly  yields  via  gradient-based  optimization.  I  then  extend  these  techniques  to  thermodynamic  models  of  nucleic  acids,  showing  that  parameters  in  the  popular  "nearest  neighbor"  model  describing  secondary  structure  thermodynamics  can  be  fit  to  data  via  gradient  descent,  enhancing  predictive  power.  I  also  apply  differentiable  molecular  dynamics  to  design  functional  colloidal  systems.            For  some  physics-based  calculations,  direct  differentiation  for  modeling  or  design  is  infeasible.  One  such  cause  is  that  a  calculation  is  differentiable  in  principle  but  computationally  prohibitive  to  unroll.  In  the  face  of  this,  I  leverage  and  extend  novel  methods  for  stochastic  gradient  estimation  to  develop  a  framework  for  fitting  coarse-grained  force  fields  to  experimental  data.  In  the  second  limiting  case,  a  calculation  may  be  inherently  discontinuous  due  to  discrete  control  variables.  One  example  of  this  is  designing  RNA  sequences  with  respect  to  the  aforementioned  nearest  neighbor  model,  for  which  I  introduce  an  algorithm  to  compute  the  expected  partition  function  over  a  probability  distribution  of  RNA  sequences,  enabling  gradient-based  RNA  design.  Building  on  these  advanced  methods  for  stochastic  gradient  estimation  and  this  probabilistic  sequence  representation,  I  develop  a  general  method  for  inverse  design  in  molecular  simulations  by  introducing  a  notion  of  expected  Hamiltonians.  I  demonstrate  how  this  enables  the  rational  design  of  intrinsically  disordered  proteins,  DNA  sequences,  and  even  improved  particle  linking  algorithms.            I  conclude  with  a  forward-looking  perspective  on  promising  applications  of  these  methods,  opportunities  for  future  methods  development,  and  proposed  directions  for  novel  interfaces  between  computation,  mathematics,  and  physics.
■590    ▼aSchool  code:  0084.
■650  4▼aApplied  mathematics
■650  4▼aBiophysics
■650  4▼aStatistical  physics
■653    ▼aDifferentiable  programming
■653    ▼aProtein
■653    ▼aAutomatic  differentiation
■653    ▼aSoft  matter
■653    ▼aStatistical  mechanics
■690    ▼a0364
■690    ▼a0786
■690    ▼a0217
■71020▼aHarvard  University▼bEngineering  and  Applied  Sciences  -  Applied  Math.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0084
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359611▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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