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Enhanced Cooperativity in a Near-Quantum Microwave-to-Optical Transducer
Enhanced Cooperativity in a Near-Quantum Microwave-to-Optical Transducer
Enhanced Cooperativity in a Near-Quantum Microwave-to-Optical Transducer

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20250211153034
ISBN  
9798346876762
DDC  
530
저자명  
Mittal, Sarang.
서명/저자  
Enhanced Cooperativity in a Near-Quantum Microwave-to-Optical Transducer
발행사항  
[Sl] : University of Colorado at Boulder, 2024
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2024
형태사항  
208 p
주기사항  
Source: Dissertations Abstracts International, Volume: 86-06, Section: B.
주기사항  
Advisor: Lehnert, Konrad W.
학위논문주기  
Thesis (Ph.D.)--University of Colorado at Boulder, 2024.
초록/해제  
요약One of the main thrusts of quantum science over the past few decades has been the development of quantum networks for the purposes of secure communication, enhanced detector sensitivity, and advanced computing. Realizing such a network of superconducting quantum processors that communicate via optical fibers would leverage the high fidelity quantum signal processing of superconducting circuits and the thermal robustness of infrared light but requires a transducer capable of connecting these two sections of the electromagnetic spectrum separated by five orders of magnitude in energy. This thesis explores the optimization of a transducer architecture where the mechanical mode of a Si3N4 membrane mediates the coupling of a superconducting lumped-element circuit and a Fabry-Perot optical cavity. We aim to maximize the coupling of these three harmonic oscillator to each other while shielding them from noisy processes that would decohere quantum signals. This architecture has led to transducers with unparalleled efficiency and continuous operation. Enhanced cooperativity between the optical cavity and mechanical oscillator enabled optically-detected readout of a superconducting qubit and optomechanical ground state cooling with negligible laser-induced heating of the superconducting qubit and microwave circuit. To surpass the threshold for quantum-enabled operation, we subsequently improved the cooperativity between the microwave circuit and mechanical oscillator by reducing the microwave loss and noise from two-level-system-like defects in the Si3N4 dielectric. When combined with enhanced coupling between the circuit and membrane or improved mechanical isolation, we project that this architecture will be capable of transducing quantum signals between the microwave and optical regimes with a signal-to-noise greater than one.
일반주제명  
Physics
일반주제명  
Applied physics
일반주제명  
Quantum physics
일반주제명  
Nanotechnology
키워드  
Cavity optomechanics
키워드  
Quantum network
키워드  
Quantum transduction
키워드  
Superconducting circuits
키워드  
Two-level system
기타저자  
University of Colorado at Boulder Physics
기본자료저록  
Dissertations Abstracts International. 86-06B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■040    ▼aMiAaPQ▼cMiAaPQ
■0820  ▼a530
■1001  ▼aMittal,  Sarang.▼0(orcid)0000-0002-1025-5782
■24510▼aEnhanced  Cooperativity  in  a  Near-Quantum  Microwave-to-Optical  Transducer
■260    ▼a[Sl]▼bUniversity  of  Colorado  at  Boulder▼c2024
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2024
■300    ▼a208  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  86-06,  Section:  B.
■500    ▼aAdvisor:  Lehnert,  Konrad  W.
■5021  ▼aThesis  (Ph.D.)--University  of  Colorado  at  Boulder,  2024.
■520    ▼aOne  of  the  main  thrusts  of  quantum  science  over  the  past  few  decades  has  been  the  development  of  quantum  networks  for  the  purposes  of  secure  communication,  enhanced  detector  sensitivity,  and  advanced  computing.  Realizing  such  a  network  of  superconducting  quantum  processors  that  communicate  via  optical  fibers  would  leverage  the  high  fidelity  quantum  signal  processing  of  superconducting  circuits  and  the  thermal  robustness  of  infrared  light  but  requires  a  transducer  capable  of  connecting  these  two  sections  of  the  electromagnetic  spectrum  separated  by  five  orders  of  magnitude  in  energy.  This  thesis  explores  the  optimization  of  a  transducer  architecture  where  the  mechanical  mode  of  a  Si3N4  membrane  mediates  the  coupling  of  a  superconducting  lumped-element  circuit  and  a  Fabry-Perot  optical  cavity.  We  aim  to  maximize  the  coupling  of  these  three  harmonic  oscillator  to  each  other  while  shielding  them  from  noisy  processes  that  would  decohere  quantum  signals.  This  architecture  has  led  to  transducers  with  unparalleled  efficiency  and  continuous  operation.  Enhanced  cooperativity  between  the  optical  cavity  and  mechanical  oscillator  enabled  optically-detected  readout  of  a  superconducting  qubit  and  optomechanical  ground  state  cooling  with  negligible  laser-induced  heating  of  the  superconducting  qubit  and  microwave  circuit.  To  surpass  the  threshold  for  quantum-enabled  operation,  we  subsequently  improved  the  cooperativity  between  the  microwave  circuit  and  mechanical  oscillator  by  reducing  the  microwave  loss  and  noise  from  two-level-system-like  defects  in  the  Si3N4  dielectric.  When  combined  with  enhanced  coupling  between  the  circuit  and  membrane  or  improved  mechanical  isolation,  we  project  that  this  architecture  will  be  capable  of  transducing  quantum  signals  between  the  microwave  and  optical  regimes  with  a  signal-to-noise  greater  than  one.
■590    ▼aSchool  code:  0051.
■650  4▼aPhysics
■650  4▼aApplied  physics
■650  4▼aQuantum  physics
■650  4▼aNanotechnology
■653    ▼aCavity  optomechanics
■653    ▼aQuantum  network
■653    ▼aQuantum  transduction
■653    ▼aSuperconducting  circuits
■653    ▼aTwo-level  system
■690    ▼a0605
■690    ▼a0599
■690    ▼a0652
■690    ▼a0215
■71020▼aUniversity  of  Colorado  at  Boulder▼bPhysics.
■7730  ▼tDissertations  Abstracts  International▼g86-06B.
■790    ▼a0051
■791    ▼aPh.D.
■792    ▼a2024
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164712▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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