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Spectral Statistics, Hydrodynamics and Quantum Chaos.
Spectral Statistics, Hydrodynamics and Quantum Chaos.

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자료유형  
 학위논문
Control Number  
0017162553
International Standard Book Number  
9798384423829
Dewey Decimal Classification Number  
530
Main Entry-Personal Name  
Winer, Michael.
Publication, Distribution, etc. (Imprint  
[S.l.] : University of Maryland, College Park., 2024
Publication, Distribution, etc. (Imprint  
Ann Arbor : ProQuest Dissertations & Theses, 2024
Physical Description  
306 p.
General Note  
Source: Dissertations Abstracts International, Volume: 86-03, Section: B.
General Note  
Advisor: Swingle, Brian;Galitski, Victor.
Dissertation Note  
Thesis (Ph.D.)--University of Maryland, College Park, 2024.
Summary, Etc.  
요약One of the central problems in many-body physics, both classical and quantum, is the relations between different notions of chaos. Ergodicity, mixing, operator growth, the eigenstate thermalization hypothesis, and spectral chaos are defined in terms of completely different objects in different contexts, don't necessarily co-occur, but still seem to be manifestations of closely related phenomena.In this dissertation, we study the relation between two notions of chaos: thermalization and spectral chaos. We define a quantity called the Total Return Probability (TRP) which measures how a system forgets its initial state after time T, and show that it is closely connected to the Spectral Form Factor (SFF), a measure of chaos deriving from the energy level spectrum of a quantum system.The main thrust of this work concerns hydrodynamic systems- systems where locality prevents charge or energy from spreading quickly, this putting a throttle on thermalization. We show that the detailed spacings of energy levels closely capture the dynamics of these locally conserved charges.We also study spin glasses, a phase of matter where the obstacle to thermalization comes not from locality but from the presence of too many neighbors. Changing one region requires changing nearby regions which requires changing nearby-to-nearby regions, until only catastrophic realignments of the whole system can fully explore phase space. In spin glasses we find our clearest analytic link between thermalization and spectral statistics. We analytically calculate the spectral form factor in the limit of large system size and show it is equal to the TRP.Finally, in the conclusion, we discuss some ideas for the future of both the SFF and the TRP.
Subject Added Entry-Topical Term  
Physics.
Subject Added Entry-Topical Term  
Nuclear physics.
Subject Added Entry-Topical Term  
Statistical physics.
Subject Added Entry-Topical Term  
Applied mathematics.
Subject Added Entry-Topical Term  
Quantum physics.
Subject Added Entry-Topical Term  
Energy.
Index Term-Uncontrolled  
Spectral statistics
Index Term-Uncontrolled  
Total Return Probability
Index Term-Uncontrolled  
Spectral Form Factor
Index Term-Uncontrolled  
Thermalization
Index Term-Uncontrolled  
Quantum system
Added Entry-Corporate Name  
University of Maryland, College Park Physics
Host Item Entry  
Dissertations Abstracts International. 86-03B.
Electronic Location and Access  
로그인을 한후 보실 수 있는 자료입니다.
Control Number  
joongbu:658280

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aWiner,  Michael.▼0(orcid)0000-0003-2222-8404
■24510▼aSpectral  Statistics,  Hydrodynamics  and  Quantum  Chaos.
■260    ▼a[S.l.]▼bUniversity  of  Maryland,  College  Park.  ▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a306  p.
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-03,  Section:  B.
■500    ▼aAdvisor:  Swingle,  Brian;Galitski,  Victor.
■5021  ▼aThesis  (Ph.D.)--University  of  Maryland,  College  Park,  2024.
■520    ▼aOne  of  the  central  problems  in  many-body  physics,  both  classical  and  quantum,  is  the  relations  between  different  notions  of  chaos.  Ergodicity,  mixing,  operator  growth,  the  eigenstate  thermalization  hypothesis,  and  spectral  chaos  are  defined  in  terms  of  completely  different  objects  in  different  contexts,  don't  necessarily  co-occur,  but  still  seem  to  be  manifestations  of  closely  related  phenomena.In  this  dissertation,  we  study  the  relation  between  two  notions  of  chaos:  thermalization  and  spectral  chaos.  We  define  a  quantity  called  the  Total  Return  Probability  (TRP)  which  measures  how  a  system  forgets  its  initial  state  after  time  T,  and  show  that  it  is  closely  connected  to  the  Spectral  Form  Factor  (SFF),  a  measure  of  chaos  deriving  from  the  energy  level  spectrum  of  a  quantum  system.The  main  thrust  of  this  work  concerns  hydrodynamic  systems-  systems  where  locality  prevents  charge  or  energy  from  spreading  quickly,  this  putting  a  throttle  on  thermalization.  We  show  that  the  detailed  spacings  of  energy  levels  closely  capture  the  dynamics  of  these  locally  conserved  charges.We  also  study  spin  glasses,  a  phase  of  matter  where  the  obstacle  to  thermalization  comes  not  from  locality  but  from  the  presence  of  too  many  neighbors.  Changing  one  region  requires  changing  nearby  regions  which  requires  changing  nearby-to-nearby  regions,  until  only  catastrophic  realignments  of  the  whole  system  can  fully  explore  phase  space.  In  spin  glasses  we  find  our  clearest  analytic  link  between  thermalization  and  spectral  statistics.  We  analytically  calculate  the  spectral  form  factor  in  the  limit  of  large  system  size  and  show  it  is  equal  to  the  TRP.Finally,  in  the  conclusion,  we  discuss  some  ideas  for  the  future  of  both  the  SFF  and  the  TRP.
■590    ▼aSchool  code:  0117.
■650  4▼aPhysics.
■650  4▼aNuclear  physics.
■650  4▼aStatistical  physics.
■650  4▼aApplied  mathematics.
■650  4▼aQuantum  physics.
■650  4▼aEnergy.
■653    ▼aSpectral  statistics
■653    ▼aTotal  Return  Probability
■653    ▼aSpectral  Form  Factor
■653    ▼aThermalization
■653    ▼aQuantum  system
■690    ▼a0605
■690    ▼a0599
■690    ▼a0756
■690    ▼a0217
■690    ▼a0364
■690    ▼a0791
■71020▼aUniversity  of  Maryland,  College  Park▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g86-03B.
■790    ▼a0117
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17162553▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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