Programmable Entanglement of Atomic Ensembles for Quantum Metrology
Programmable Entanglement of Atomic Ensembles for Quantum Metrology
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211153101
- ISBN
- 9798346390480
- DDC
- 910.285
- 서명/저자
- Programmable Entanglement of Atomic Ensembles for Quantum Metrology
- 발행사항
- [Sl] : Stanford University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 126 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-05, Section: B.
- 주기사항
- Advisor: Schleier-Smith, Monika.
- 학위논문주기
- Thesis (Ph.D.)--Stanford University, 2024.
- 초록/해제
- 요약State of the art atomic sensors typically consist of many atoms working in parallel. When engineered to eliminate technical noise, these sensors approach the standard quantum limit set by the quantum projection noise of independent atoms. Optical cavities enable single-parameter sensing beyond this limit by efficiently generating all-to-all entanglement. However, extending quantum advantage to tasks like imaging or sensor networks requires additional spatial control over entanglement. In this thesis, we combine global cavity-mediated interactions with local spin rotations to generate and leverage structured, non-local entanglement for multimode quantum metrology.In our system, all-to-all interactions mediated by an optical cavity produce spin-nematic squeezing. This form of squeezing, which leverages the spin-1 nature of the ground state of rubidium atoms, is robust against sources of technical noise including global magnetic field drift. These robust dynamics, previously demonstrated with collisional interactions in spinor condensates, are a useful tool for exploring novel metrology protocols. In particular, we leverage these dynamics in echo-based interferometry sequences, demonstrating up to 6 dB of metrological gain by using interactions both to generate entanglement and to amplify displacements before readout.By interspersing global interactions with local rotations, we can either localize entanglement to within subsystems or demonstrate non-local entanglement. In system sizes of up to four ensembles, we have demonstrated that this scheme produces continuous variable graph states with provable entanglement structures (specified by the graph) and metrologically useful multimode spin squeezing. By using a magnetic field gradient to perform local rotations among up to 18 ensembles, we have also generated exotic effective geometries, including a Mobius ladder and a treelike graph inspired by quantum models for spacetime. This demonstrates the scalability of our approach to generating structured entangled states for quantum metrology.Combining programmable entanglement with interaction-based readout enables multiparameter estimation protocols. In particular, we show that a two mode squeezed state, involving entanglement between a sensor and an ancilla, can be used to simultaneously sense displacements in conjugate variables. This scheme circumvents the limit for local sensors set by the Heisenberg uncertainty principle. Interaction-based readout is key to this protocol, allowing non-destructive readout of the two squeezed modes without unnecessary quantum back-action.
- 일반주제명
- Interferometry
- 일반주제명
- Science education
- 일반주제명
- Clocks & watches
- 일반주제명
- Magnetic fields
- 일반주제명
- Pandemics
- 일반주제명
- Gravitational waves
- 일반주제명
- Energy
- 일반주제명
- Theory of relativity
- 일반주제명
- Reproducibility
- 일반주제명
- Aerospace engineering
- 일반주제명
- Astrophysics
- 일반주제명
- Atomic physics
- 일반주제명
- Electromagnetics
- 일반주제명
- Epidemiology
- 일반주제명
- Optics
- 일반주제명
- Theoretical physics
- 기타저자
- Stanford University.
- 기본자료저록
- Dissertations Abstracts International. 86-05B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■1001 ▼aCooper, Eric Scott.
■24510▼aProgrammable Entanglement of Atomic Ensembles for Quantum Metrology
■260 ▼a[Sl]▼bStanford University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a126 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-05, Section: B.
■500 ▼aAdvisor: Schleier-Smith, Monika.
■5021 ▼aThesis (Ph.D.)--Stanford University, 2024.
■520 ▼aState of the art atomic sensors typically consist of many atoms working in parallel. When engineered to eliminate technical noise, these sensors approach the standard quantum limit set by the quantum projection noise of independent atoms. Optical cavities enable single-parameter sensing beyond this limit by efficiently generating all-to-all entanglement. However, extending quantum advantage to tasks like imaging or sensor networks requires additional spatial control over entanglement. In this thesis, we combine global cavity-mediated interactions with local spin rotations to generate and leverage structured, non-local entanglement for multimode quantum metrology.In our system, all-to-all interactions mediated by an optical cavity produce spin-nematic squeezing. This form of squeezing, which leverages the spin-1 nature of the ground state of rubidium atoms, is robust against sources of technical noise including global magnetic field drift. These robust dynamics, previously demonstrated with collisional interactions in spinor condensates, are a useful tool for exploring novel metrology protocols. In particular, we leverage these dynamics in echo-based interferometry sequences, demonstrating up to 6 dB of metrological gain by using interactions both to generate entanglement and to amplify displacements before readout.By interspersing global interactions with local rotations, we can either localize entanglement to within subsystems or demonstrate non-local entanglement. In system sizes of up to four ensembles, we have demonstrated that this scheme produces continuous variable graph states with provable entanglement structures (specified by the graph) and metrologically useful multimode spin squeezing. By using a magnetic field gradient to perform local rotations among up to 18 ensembles, we have also generated exotic effective geometries, including a Mobius ladder and a treelike graph inspired by quantum models for spacetime. This demonstrates the scalability of our approach to generating structured entangled states for quantum metrology.Combining programmable entanglement with interaction-based readout enables multiparameter estimation protocols. In particular, we show that a two mode squeezed state, involving entanglement between a sensor and an ancilla, can be used to simultaneously sense displacements in conjugate variables. This scheme circumvents the limit for local sensors set by the Heisenberg uncertainty principle. Interaction-based readout is key to this protocol, allowing non-destructive readout of the two squeezed modes without unnecessary quantum back-action.
■590 ▼aSchool code: 0212.
■650 4▼aGlobal positioning systems--GPS
■650 4▼aInterferometry
■650 4▼aScience education
■650 4▼aClocks & watches
■650 4▼aMagnetic fields
■650 4▼aPandemics
■650 4▼aGravitational waves
■650 4▼aEnergy
■650 4▼aTheory of relativity
■650 4▼aReproducibility
■650 4▼aAtoms & subatomic particles
■650 4▼aAerospace engineering
■650 4▼aAstrophysics
■650 4▼aAtomic physics
■650 4▼aElectromagnetics
■650 4▼aEpidemiology
■650 4▼aOptics
■650 4▼aTheoretical physics
■690 ▼a0791
■690 ▼a0714
■690 ▼a0538
■690 ▼a0596
■690 ▼a0748
■690 ▼a0607
■690 ▼a0766
■690 ▼a0752
■690 ▼a0753
■71020▼aStanford University.
■7730 ▼tDissertations Abstracts International▼g86-05B.
■790 ▼a0212
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17164903▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
