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Autonomous Stabilization and Quantum Squeezing of a Spin Ensemble Coupled to a Driven Optical Cavity
Autonomous Stabilization and Quantum Squeezing of a Spin Ensemble Coupled to a Driven Opti...
Autonomous Stabilization and Quantum Squeezing of a Spin Ensemble Coupled to a Driven Optical Cavity

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105115
ISBN  
9798297601680
DDC  
539
저자명  
Eilbott, Olive.
서명/저자  
Autonomous Stabilization and Quantum Squeezing of a Spin Ensemble Coupled to a Driven Optical Cavity
발행사항  
[Sl] : University of California, Berkeley, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
134 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-04, Section: B.
주기사항  
Advisor: Stamper-Kurn, Dan M.
학위논문주기  
Thesis (Ph.D.)--University of California, Berkeley, 2025.
초록/해제  
요약The development of quantum mechanics introduced ideas of measurement and information connected to the quantum nature of systems under study. Measurement is intrinsically linked to back-action that disturbs the measured system. Information extracted from a classical or quantum system can be used to steer the state of the system by conditioning the action of an appropriate actuator on the extracted information. Classical feedback to a quantum system involves conditioning the system Hamiltonian on measurement results, and in recent years has been used to produce entangled states that have been shown to exhibit squeezing. In the absence of conditional input to a system, dissipation can cause interacting subsystems and single systems with time-delayed self-interactions to exhibit coherent quantum feedback, wherein the interactions stabilize the system state.In this work I explore the optodynamical light-matter interaction between a cloud of atoms and a dispersively coupled optical cavity and study the exchange of angular momentum between the light field and the collective atomic spin formed by symmetrically coupled 87Rb atoms in their F = 2 hyperfine ground-state manifold. Weaving together the two concepts of conditional squeezing by weak measurement and of autonomous optodynamical stabilization, I build a theory of a novel type of autonomous squeezing in which dissipative coherent quantum feedback powered by light pumping the cavity produces an unconditionally squeezed spin state. Additionally, I show that the state is simultaneously conditionally squeezed. Equipped with a portion of the information carried by photons leaving the cavity, a conditional rotation on the state produces a deterministically squeezed state of the collective spin out to infinite time, in the absence of scattering and other decoherence. In the presence of scattering I show that the system exhibits squeezing at intermediate times.In a detour from spin optodynamics, I report a series of experiments exploring molecular photoassociation in an optical cavity that demonstrate real-time monitoring of the photoassociation dynamics, and I discuss the prospects and motivation for observing cavity-mediated photoassociation.
일반주제명  
Atomic physics
일반주제명  
Molecular physics
일반주제명  
Quantum physics
일반주제명  
Optics
키워드  
Quantum mechanics
키워드  
Stabilization
키워드  
Quantum squeezing
키워드  
Optical cavity
키워드  
Optodynamics
기타저자  
University of California, Berkeley Physics
기본자료저록  
Dissertations Abstracts International. 87-04B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■035    ▼a(MiAaPQ)AAI32237348
■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a539
■1001  ▼aEilbott,  Olive.
■24510▼aAutonomous  Stabilization  and  Quantum  Squeezing  of  a  Spin  Ensemble  Coupled  to  a  Driven  Optical  Cavity
■260    ▼a[Sl]▼bUniversity  of  California,  Berkeley▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a134  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-04,  Section:  B.
■500    ▼aAdvisor:  Stamper-Kurn,  Dan  M.
■5021  ▼aThesis  (Ph.D.)--University  of  California,  Berkeley,  2025.
■520    ▼aThe  development  of  quantum  mechanics  introduced  ideas  of  measurement  and  information  connected  to  the  quantum  nature  of  systems  under  study.  Measurement  is  intrinsically  linked  to  back-action  that  disturbs  the  measured  system.  Information  extracted  from  a  classical  or  quantum  system  can  be  used  to  steer  the  state  of  the  system  by  conditioning  the  action  of  an  appropriate  actuator  on  the  extracted  information.  Classical  feedback  to  a  quantum  system  involves  conditioning  the  system  Hamiltonian  on  measurement  results,  and  in  recent  years  has  been  used  to  produce  entangled  states  that  have  been  shown  to  exhibit  squeezing.  In  the  absence  of  conditional  input  to  a  system,  dissipation  can  cause  interacting  subsystems  and  single  systems  with  time-delayed  self-interactions  to  exhibit  coherent  quantum  feedback,  wherein  the  interactions  stabilize  the  system  state.In  this  work  I  explore  the  optodynamical  light-matter  interaction  between  a  cloud  of  atoms  and  a  dispersively  coupled  optical  cavity  and  study  the  exchange  of  angular  momentum  between  the  light  field  and  the  collective  atomic  spin  formed  by  symmetrically  coupled  87Rb  atoms  in  their  F  =  2  hyperfine  ground-state  manifold.  Weaving  together  the  two  concepts  of  conditional  squeezing  by  weak  measurement  and  of  autonomous  optodynamical  stabilization,  I  build  a  theory  of  a  novel  type  of  autonomous  squeezing  in  which  dissipative  coherent  quantum  feedback  powered  by  light  pumping  the  cavity  produces  an  unconditionally  squeezed  spin  state.  Additionally,  I  show  that  the  state  is  simultaneously  conditionally  squeezed.  Equipped  with  a  portion  of  the  information  carried  by  photons  leaving  the  cavity,  a  conditional  rotation  on  the  state  produces  a  deterministically  squeezed  state  of  the  collective  spin  out  to  infinite  time,  in  the  absence  of  scattering  and  other  decoherence.  In  the  presence  of  scattering  I  show  that  the  system  exhibits  squeezing  at  intermediate  times.In  a  detour  from  spin  optodynamics,  I  report  a  series  of  experiments  exploring  molecular  photoassociation  in  an  optical  cavity  that  demonstrate  real-time  monitoring  of  the  photoassociation  dynamics,  and  I  discuss  the  prospects  and  motivation  for  observing  cavity-mediated  photoassociation.
■590    ▼aSchool  code:  0028.
■650  4▼aAtomic  physics
■650  4▼aMolecular  physics
■650  4▼aQuantum  physics
■650  4▼aOptics
■653    ▼aQuantum  mechanics
■653    ▼aStabilization
■653    ▼aQuantum  squeezing
■653    ▼aOptical  cavity
■653    ▼aOptodynamics
■690    ▼a0748
■690    ▼a0752
■690    ▼a0599
■690    ▼a0609
■71020▼aUniversity  of  California,  Berkeley▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g87-04B.
■790    ▼a0028
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359408▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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