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Dissipative and Spin Effects in Classical Gravity from Quantum Scattering Amplitudes
Dissipative and Spin Effects in Classical Gravity from Quantum Scattering Amplitudes
Dissipative and Spin Effects in Classical Gravity from Quantum Scattering Amplitudes

상세정보

자료유형  
 학위논문 서양
최종처리일시  
20260202105637
ISBN  
9798265454270
DDC  
530.1
저자명  
Gatica, Juan Pablo.
서명/저자  
Dissipative and Spin Effects in Classical Gravity from Quantum Scattering Amplitudes
발행사항  
[Sl] : University of California, Los Angeles, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
213 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
주기사항  
Advisor: Bern, Zvi.
학위논문주기  
Thesis (Ph.D.)--University of California, Los Angeles, 2025.
초록/해제  
요약Quantum scattering amplitudes have proven to be a powerful tool in high-precision calculations of classical gravity; especially in the dynamics of gravitational waves. By considering a hierarchy of relevant length scales, extracting the classical limit of black hole scattering from the quantum field theory approach has successfully pushed the Post-Minkowskian expansion further and faster than ever. In this work, we will continue this program while focusing on dissipative and spin effects. We will also explore these effects for the case of general spinning bodies, reducing to the special case of black holes for comparisons. In Chapter 1, we calculate radiative corrections to classical two-body scattering in electrodynamics using the Kosower-Maybee-O'Connell (KMOC) formalism and Eikonal phase while comparing to traditional equations of motions techniques. Electrodynamics has long been an insightful toy model for gravity; the results of Chapter 1 helped inform the interpretation of high-energy limit divergences that persist in spite of considering non-conservative effects. In Chapter 2, we introduce spin by considering higher spin fields as an effective field theory (EFT) and calculate a formula directly relating the impulse and spin kick to the Eikonal phase. We limit ourselves to linear-in-spin corrections in order to better understand how the inclusion of spin complicates the calculation of scattering observables using the KMOC formalism. In Chapter 3, we generalize the linear-in-spin calculation to all orders in spin by only considering general properties of higher spin fields. In this more general case, we derive a formula relating observables to operators acting on the Eikonal phase valid to all orders in spin. We also observe interesting similarities between the impulse and spin kick calculations. For the both the linear-in-spin and all-orders-in-spin cases, we verified our derivation by comparing to known results from the worldline formalism and the stationary phase approximation. In Chapter 4, we consider spin-transition and absorptive effects in tandem. We account for spin transition and absorption by coupling fields of different spins and masses to massless scalars, photons and gravitons, creating a series of non-minimal couplings in our EFT Lagrangian. We then use KMOC and Kallen-Lehman propagators to calculate the absorptive impulse of various spin-transition channels. We observe an interesting symmetry and suppression, which we call Floor-Ceiling Symmetry and No-Floor suppression. We also observe that spin universality is maintained. We include an appendix to supplement arguments in the body of the Chapters that would otherwise obscure the main goal findings of the Chapters.
일반주제명  
Theoretical physics
일반주제명  
Quantum physics
일반주제명  
Astrophysics
키워드  
Black holes
키워드  
Gravity
키워드  
Quantum electrodynamics
키워드  
Scattering amplitudes
키워드  
Electrodynamics
기타저자  
University of California, Los Angeles Physics 0666
기본자료저록  
Dissertations Abstracts International. 87-06B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a530.1
■1001  ▼aGatica,  Juan  Pablo.
■24510▼aDissipative  and  Spin  Effects  in  Classical  Gravity  from  Quantum  Scattering  Amplitudes
■260    ▼a[Sl]▼bUniversity  of  California,  Los  Angeles▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a213  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-06,  Section:  B.
■500    ▼aAdvisor:  Bern,  Zvi.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Los  Angeles,  2025.
■520    ▼aQuantum  scattering  amplitudes  have  proven  to  be  a  powerful  tool  in  high-precision  calculations  of  classical  gravity;  especially  in  the  dynamics  of  gravitational  waves.  By  considering  a  hierarchy  of  relevant  length  scales,  extracting  the  classical  limit  of  black  hole  scattering  from  the  quantum  field  theory  approach  has  successfully  pushed  the  Post-Minkowskian  expansion  further  and  faster  than  ever.  In  this  work,  we  will  continue  this  program  while  focusing  on  dissipative  and  spin  effects.  We  will  also  explore  these  effects  for  the  case  of  general  spinning  bodies,  reducing  to  the  special  case  of  black  holes  for  comparisons.  In  Chapter  1,  we  calculate  radiative  corrections  to  classical  two-body  scattering  in  electrodynamics  using  the  Kosower-Maybee-O'Connell  (KMOC)  formalism  and  Eikonal  phase  while  comparing  to  traditional  equations  of  motions  techniques.  Electrodynamics  has  long  been  an  insightful  toy  model  for  gravity;  the  results  of  Chapter  1  helped  inform  the  interpretation  of  high-energy  limit  divergences  that  persist  in  spite  of  considering  non-conservative  effects.  In  Chapter  2,  we  introduce  spin  by  considering  higher  spin  fields  as  an  effective  field  theory  (EFT)  and  calculate  a  formula  directly  relating  the  impulse  and  spin  kick  to  the  Eikonal  phase.  We  limit  ourselves  to  linear-in-spin  corrections  in  order  to  better  understand  how  the  inclusion  of  spin  complicates  the  calculation  of  scattering  observables  using  the  KMOC  formalism.  In  Chapter  3,  we  generalize  the  linear-in-spin  calculation  to  all  orders  in  spin  by  only  considering  general  properties  of  higher  spin  fields.  In  this  more  general  case,  we  derive  a  formula  relating  observables  to  operators  acting  on  the  Eikonal  phase  valid  to  all  orders  in  spin.  We  also  observe  interesting  similarities  between  the  impulse  and  spin  kick  calculations.  For  the  both  the  linear-in-spin  and  all-orders-in-spin  cases,  we  verified  our  derivation  by  comparing  to  known  results  from  the  worldline  formalism  and  the  stationary  phase  approximation.  In  Chapter  4,  we  consider  spin-transition  and  absorptive  effects  in  tandem.  We  account  for  spin  transition  and  absorption  by  coupling  fields  of  different  spins  and  masses  to  massless  scalars,  photons  and  gravitons,  creating  a  series  of  non-minimal  couplings  in  our  EFT  Lagrangian.  We  then  use  KMOC  and  Kallen-Lehman  propagators  to  calculate  the  absorptive  impulse  of  various  spin-transition  channels.  We  observe  an  interesting  symmetry  and  suppression,  which  we  call  Floor-Ceiling  Symmetry  and  No-Floor  suppression.  We  also  observe  that  spin  universality  is  maintained.  We  include  an  appendix  to  supplement  arguments  in  the  body  of  the  Chapters  that  would  otherwise  obscure  the  main  goal  findings  of  the  Chapters.
■590    ▼aSchool  code:  0031.
■650  4▼aTheoretical  physics
■650  4▼aQuantum  physics
■650  4▼aAstrophysics
■653    ▼aBlack  holes
■653    ▼aGravity
■653    ▼aQuantum  electrodynamics
■653    ▼aScattering  amplitudes
■653    ▼aElectrodynamics
■690    ▼a0753
■690    ▼a0599
■690    ▼a0596
■71020▼aUniversity  of  California,  Los  Angeles▼bPhysics  0666.
■7730  ▼tDissertations  Abstracts  International▼g87-06B.
■790    ▼a0031
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360913▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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