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Dynamical Control of Many-Body Interactions in Driven Quantum Matter
Dynamical Control of Many-Body Interactions in Driven Quantum Matter
Dynamical Control of Many-Body Interactions in Driven Quantum Matter

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202104748
ISBN  
9798290657158
DDC  
530
저자명  
Yang, Christopher Kai-Chen.
서명/저자  
Dynamical Control of Many-Body Interactions in Driven Quantum Matter
발행사항  
[Sl] : California Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
242 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
주기사항  
Advisor: Refael, Gil.
학위논문주기  
Thesis (Ph.D.)--California Institute of Technology, 2025.
초록/해제  
요약Strongly driven Floquet systems have emerged as promising platforms for exotic non-equilibrium physics, but their instability to heating motivates practical questions about how Floquet engineering can be useful. Although drive-induced heating is often attributed to interactions, this thesis adopts a different perspective, identifying regimes where dissipative many-body dynamics can stabilize Floquet physics and define remarkable new drive-tunable properties. This principle enables highly tunable many-body steady states with minimal heating, leading to a novel regime where drive control over single-particle Floquet states can extend to many-body interactions. Our theoretical and experimental results in Parts II and III center around two themes. The first theme focuses on discovering controllable and stable many-body Floquet states. The second explores further into what the future holds- envisioning the prospects for unconventional Floquet physics with nontraditional driving fields and three-dimensional materials.Part II of this thesis leverages kinematic constraints on low-dimensional manybody scattering as new principles for tuning and stabilizing Floquet phases. First, we predict that a circularly polarized laser can drive slow electrons of moire systems into a subsonic regime where they decouple from the intrinsic 2D acoustic phonons of the system. This "slow-electron regime" enables optical control over the steady-state occupation of topological Floquet states and the resulting anomalous Hall conductivity. Second, we present experimental transport signatures of steady Floquet physics in graphene irradiated by a continuous-wave laser. Our experiment, performed at 3-4 K lattice temperatures with lasers off-resonant to optical phonons, creates electron-phonon scattering bottlenecks that stabilize persistent lowtemperature phases with light-induced longitudinal transport characteristics. The long-lived many-body phase represents the first experimental signatures of steady Floquet physics in a metallic solid.Part III presents emerging opportunities for many-body Floquet engineering beyond traditional optically-driven, low-dimensional materials. We first explore beyondoptical driving fields, revealing the emergence of quantized charge transport in 1D systems driven by coherent phonons. Incoherent phonons relax electrons into a topological spatiotemporal Floquet state with quantized group velocity set by the coherent phonon, realizing topological charge pumping in a highly non-adiabatic setting. Finally, we address the topological effects of time-periodic drives beyond low-dimensional systems, revealing that THz-frequency, circularly polarized light can induce topological chiral plasmons in Weyl semimetals with band anisotropy, broken time-reversal symmetry, and broken inversion symmetry.The theoretical and experimental work in this thesis represent key progress towards realizing persistent Floquet physics for diverse applications in quantum device engineering.
일반주제명  
Physics
일반주제명  
Electrons
일반주제명  
Nanowires
일반주제명  
Writing
일반주제명  
Lasers
일반주제명  
Symmetry
일반주제명  
Schrodinger equation
일반주제명  
Energy
일반주제명  
Graphene
기타저자  
California Institute of Technology Physics Mathematics and Astronomy
기본자료저록  
Dissertations Abstracts International. 87-01B.
전자적 위치 및 접속  
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MARC

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■0820  ▼a530
■1001  ▼aYang,  Christopher  Kai-Chen.
■24510▼aDynamical  Control  of  Many-Body  Interactions  in  Driven  Quantum  Matter
■260    ▼a[Sl]▼bCalifornia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a242  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-01,  Section:  B.
■500    ▼aAdvisor:  Refael,  Gil.
■5021  ▼aThesis  (Ph.D.)--California  Institute  of  Technology,  2025.
■520    ▼aStrongly  driven  Floquet  systems  have  emerged  as  promising  platforms  for  exotic  non-equilibrium  physics,  but  their  instability  to  heating  motivates  practical  questions  about  how  Floquet  engineering  can  be  useful.  Although  drive-induced  heating  is  often  attributed  to  interactions,  this  thesis  adopts  a  different  perspective,  identifying  regimes  where  dissipative  many-body  dynamics  can  stabilize  Floquet  physics  and  define  remarkable  new  drive-tunable  properties.  This  principle  enables  highly  tunable  many-body  steady  states  with  minimal  heating,  leading  to  a  novel  regime  where  drive  control  over  single-particle  Floquet  states  can  extend  to  many-body  interactions.  Our  theoretical  and  experimental  results  in  Parts  II  and  III  center  around  two  themes.  The  first  theme  focuses  on  discovering  controllable  and  stable  many-body  Floquet  states.  The  second  explores  further  into  what  the  future  holds-  envisioning  the  prospects  for  unconventional  Floquet  physics  with  nontraditional  driving  fields  and  three-dimensional  materials.Part  II  of  this  thesis  leverages  kinematic  constraints  on  low-dimensional  manybody  scattering  as  new  principles  for  tuning  and  stabilizing  Floquet  phases.  First,  we  predict  that  a  circularly  polarized  laser  can  drive  slow  electrons  of  moire  systems  into  a  subsonic  regime  where  they  decouple  from  the  intrinsic  2D  acoustic  phonons  of  the  system.  This  "slow-electron  regime"  enables  optical  control  over  the  steady-state  occupation  of  topological  Floquet  states  and  the  resulting  anomalous  Hall  conductivity.  Second,  we  present  experimental  transport  signatures  of  steady  Floquet  physics  in  graphene  irradiated  by  a  continuous-wave  laser.  Our  experiment,  performed  at  3-4  K  lattice  temperatures  with  lasers  off-resonant  to  optical  phonons,  creates  electron-phonon  scattering  bottlenecks  that  stabilize  persistent  lowtemperature  phases  with  light-induced  longitudinal  transport  characteristics.  The  long-lived  many-body  phase  represents  the  first  experimental  signatures  of  steady  Floquet  physics  in  a  metallic  solid.Part  III  presents  emerging  opportunities  for  many-body  Floquet  engineering  beyond  traditional  optically-driven,  low-dimensional  materials.  We  first  explore  beyondoptical  driving  fields,  revealing  the  emergence  of  quantized  charge  transport  in  1D  systems  driven  by  coherent  phonons.  Incoherent  phonons  relax  electrons  into  a  topological  spatiotemporal  Floquet  state  with  quantized  group  velocity  set  by  the  coherent  phonon,  realizing  topological  charge  pumping  in  a  highly  non-adiabatic  setting.  Finally,  we  address  the  topological  effects  of  time-periodic  drives  beyond  low-dimensional  systems,  revealing  that  THz-frequency,  circularly  polarized  light  can  induce  topological  chiral  plasmons  in  Weyl  semimetals  with  band  anisotropy,  broken  time-reversal  symmetry,  and  broken  inversion  symmetry.The  theoretical  and  experimental  work  in  this  thesis  represent  key  progress  towards  realizing  persistent  Floquet  physics  for  diverse  applications  in  quantum  device  engineering.
■590    ▼aSchool  code:  0037.
■650  4▼aPhysics
■650  4▼aElectrons
■650  4▼aNanowires
■650  4▼aWriting
■650  4▼aLasers
■650  4▼aSymmetry
■650  4▼aSchrodinger  equation
■650  4▼aEnergy
■650  4▼aGraphene
■690    ▼a0791
■690    ▼a0605
■71020▼aCalifornia  Institute  of  Technology▼bPhysics,  Mathematics  and  Astronomy.
■7730  ▼tDissertations  Abstracts  International▼g87-01B.
■790    ▼a0037
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358760▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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