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Quantum Metrology for Enhanced Gravitational-Wave Detection
Quantum Metrology for Enhanced Gravitational-Wave Detection
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105057
- ISBN
- 9798288817021
- DDC
- 520
- 서명/저자
- Quantum Metrology for Enhanced Gravitational-Wave Detection
- 발행사항
- [Sl] : California Institute of Technology, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 114 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-01, Section: B.
- 주기사항
- Advisor: Chen, Yanbei.
- 학위논문주기
- Thesis (Ph.D.)--California Institute of Technology, 2025.
- 초록/해제
- 요약Current ground-based gravitational wave detectors are reaching sensitivity limits imposed by quantum, thermal, seismic, and Newtonian noise, motivating the development of novel techniques to surpass these fundamental barriers. This thesis investigates two complementary approaches to enhance interferometric gravitational wave astronomy: displacement-noise-free interferometry (DFI) and real-time waveform estimation via Kalman filtering.First, we introduce a resonant triangular-cavity topology that, by exploiting redundant readout channels, isolates phase shifts induced by gravitational waves from mirror displacement noise. Within an input-output formalism, we define the displacement-free subspace as the null space of the mirror-noise transfer matrix and demonstrate that this configuration retains finite quantum Fisher information even in the limit of arbitrarily large mirror motion. Incorporating realistic thermal and radiation-pressure noise models, we derive optimal homodyne detection angles, characterize pseudo-displacement-free modes over finite bandwidths, and quantify the effect of injected squeezing. Extensions to n-gon cavity networks further establish the versatility and practical feasibility of the DFI paradigm.Second, we cast the readout of detuned interferometers as a multi-parameter estimation problem, where gravitational-wave signals couple amplitude and phase quadratures. To recover the quantum Cramer-Rao bound for a chosen quadrature, we design Bayesian filters --- specifically, Extended and Unscented Kalman Filters --- that treat the orthogonal quadrature as an effective disturbance. Numerical simulations under realistic signal-to-noise conditions reveal that these filters attain the optimal bound for amplitude estimation while providing reliable uncertainty quantification, matching the performance of particle-filter approaches at a fraction of the computational cost.By combining architectural immunity to displacement noise with algorithmic optimality in waveform extraction, this work lays a foundation for quantum-enhanced, broadband gravitational wave observatories. The results inform near-term upgrades and guide the conceptual design of third-generation detectors (e.g., Einstein Telescope, Cosmic Explorer), where mitigating low-frequency environmental noise and delivering real-time signal processing are critical.
- 일반주제명
- Astronomy
- 일반주제명
- Interferometry
- 일반주제명
- Lasers
- 일반주제명
- Black holes
- 일반주제명
- Neutron stars
- 일반주제명
- Gravitational waves
- 일반주제명
- Kalman filters
- 일반주제명
- Optics
- 일반주제명
- Astrophysics
- 기타저자
- California Institute of Technology Physics Mathematics and Astronomy
- 기본자료저록
- Dissertations Abstracts International. 87-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105057
■006m o d
■007cr#unu||||||||
■020 ▼a9798288817021
■035 ▼a(MiAaPQ)AAI32205953
■035 ▼a(MiAaPQ)Caltech17328
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a520
■1001 ▼aTarafder, Rajashik.▼0(orcid)0000-0002-5994-3105
■24510▼aQuantum Metrology for Enhanced Gravitational-Wave Detection
■260 ▼a[Sl]▼bCalifornia Institute of Technology▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a114 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-01, Section: B.
■500 ▼aAdvisor: Chen, Yanbei.
■5021 ▼aThesis (Ph.D.)--California Institute of Technology, 2025.
■520 ▼aCurrent ground-based gravitational wave detectors are reaching sensitivity limits imposed by quantum, thermal, seismic, and Newtonian noise, motivating the development of novel techniques to surpass these fundamental barriers. This thesis investigates two complementary approaches to enhance interferometric gravitational wave astronomy: displacement-noise-free interferometry (DFI) and real-time waveform estimation via Kalman filtering.First, we introduce a resonant triangular-cavity topology that, by exploiting redundant readout channels, isolates phase shifts induced by gravitational waves from mirror displacement noise. Within an input-output formalism, we define the displacement-free subspace as the null space of the mirror-noise transfer matrix and demonstrate that this configuration retains finite quantum Fisher information even in the limit of arbitrarily large mirror motion. Incorporating realistic thermal and radiation-pressure noise models, we derive optimal homodyne detection angles, characterize pseudo-displacement-free modes over finite bandwidths, and quantify the effect of injected squeezing. Extensions to n-gon cavity networks further establish the versatility and practical feasibility of the DFI paradigm.Second, we cast the readout of detuned interferometers as a multi-parameter estimation problem, where gravitational-wave signals couple amplitude and phase quadratures. To recover the quantum Cramer-Rao bound for a chosen quadrature, we design Bayesian filters --- specifically, Extended and Unscented Kalman Filters --- that treat the orthogonal quadrature as an effective disturbance. Numerical simulations under realistic signal-to-noise conditions reveal that these filters attain the optimal bound for amplitude estimation while providing reliable uncertainty quantification, matching the performance of particle-filter approaches at a fraction of the computational cost.By combining architectural immunity to displacement noise with algorithmic optimality in waveform extraction, this work lays a foundation for quantum-enhanced, broadband gravitational wave observatories. The results inform near-term upgrades and guide the conceptual design of third-generation detectors (e.g., Einstein Telescope, Cosmic Explorer), where mitigating low-frequency environmental noise and delivering real-time signal processing are critical.
■590 ▼aSchool code: 0037.
■650 4▼aAstronomy
■650 4▼aInterferometry
■650 4▼aLasers
■650 4▼aBlack holes
■650 4▼aNeutron stars
■650 4▼aGravitational waves
■650 4▼aKalman filters
■650 4▼aOptics
■650 4▼aAstrophysics
■690 ▼a0752
■690 ▼a0606
■690 ▼a0596
■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=T17359299▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


