서브메뉴
검색
High-Fidelity Control of 133Ba+ Qubits for Single-Species Trapped Ion Quantum Computing
High-Fidelity Control of 133Ba+ Qubits for Single-Species Trapped Ion Quantum Computing
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104648
- ISBN
- 9798280767645
- DDC
- 539
- 서명/저자
- High-Fidelity Control of 133Ba+ Qubits for Single-Species Trapped Ion Quantum Computing
- 발행사항
- [Sl] : University of California, Los Angeles, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 169 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Campbell, Wesley;Hudson, Eric.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2025.
- 초록/해제
- 요약Trapped ion quantum computing offers a compelling path toward fault-tolerant quantum information processing due to the long coherence times, high-fidelity operations, and scalable architectures made possible by electromagnetic confinement and laser control. A leading architecture employs multiple atomic species to separately manage logic and sympathetic cooling tasks, but this approach introduces experimental complexity, mass mismatch, and additional optical requirements. This dissertation explores an alternative strategy-performing all quantum operations within a single atomic species, 133Ba+-by leveraging a novel qubit protocol utilizing three internal manifolds: optical (o), metastable (m), and ground (g), collectively referred to as the omg protocol. We demonstrate coherent control over both the g and m-qubit manifolds using a single 532 nm laser for stimulated Raman transitions, and quantify fidelity-limiting effects including Raman scattering errors via an ω 3 -weighted decay model. The D5/2 hyperfine clock qubit splitting is measured via Raman spectroscopy, and SPAM infidelities are bench marked for the metastable manifold. We further investigate differential light shifts between qubit types and define "magic" polarization and magnetic field conditions that minimize cross-talk during global laser based gates. Finally, we demonstrate electric quadrupole o qubit transitions in a retro-reflected 1762 nm standing wave and characterize effective carrier Rabi rates under realistic thermal and spatial uncertainties.These results collectively establish 133Ba+ as a viable single-species platform for scalable quantum computing. This work provides practical tools and calibration methods for implementing the omg protocol in future systems, and establishes new experimental constraints on scattering, fidelity, and coherence across multiple qubit encodings.
- 일반주제명
- Atomic physics
- 일반주제명
- Quantum physics
- 일반주제명
- Computational physics
- 키워드
- Barium
- 키워드
- Quantum
- 키워드
- Qubits
- 키워드
- Trapped ions
- 기타저자
- University of California, Los Angeles Physics 0666
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2025 us c eng d■001000017358347
■00520260202104648
■006m o d
■007cr#unu||||||||
■020 ▼a9798280767645
■035 ▼a(MiAaPQ)AAI32114773
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a539
■1001 ▼aVizvary, Samuel R.
■24510▼aHigh-Fidelity Control of 133Ba+ Qubits for Single-Species Trapped Ion Quantum Computing
■260 ▼a[Sl]▼bUniversity of California, Los Angeles▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a169 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Campbell, Wesley;Hudson, Eric.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2025.
■520 ▼aTrapped ion quantum computing offers a compelling path toward fault-tolerant quantum information processing due to the long coherence times, high-fidelity operations, and scalable architectures made possible by electromagnetic confinement and laser control. A leading architecture employs multiple atomic species to separately manage logic and sympathetic cooling tasks, but this approach introduces experimental complexity, mass mismatch, and additional optical requirements. This dissertation explores an alternative strategy-performing all quantum operations within a single atomic species, 133Ba+-by leveraging a novel qubit protocol utilizing three internal manifolds: optical (o), metastable (m), and ground (g), collectively referred to as the omg protocol. We demonstrate coherent control over both the g and m-qubit manifolds using a single 532 nm laser for stimulated Raman transitions, and quantify fidelity-limiting effects including Raman scattering errors via an ω 3 -weighted decay model. The D5/2 hyperfine clock qubit splitting is measured via Raman spectroscopy, and SPAM infidelities are bench marked for the metastable manifold. We further investigate differential light shifts between qubit types and define "magic" polarization and magnetic field conditions that minimize cross-talk during global laser based gates. Finally, we demonstrate electric quadrupole o qubit transitions in a retro-reflected 1762 nm standing wave and characterize effective carrier Rabi rates under realistic thermal and spatial uncertainties.These results collectively establish 133Ba+ as a viable single-species platform for scalable quantum computing. This work provides practical tools and calibration methods for implementing the omg protocol in future systems, and establishes new experimental constraints on scattering, fidelity, and coherence across multiple qubit encodings.
■590 ▼aSchool code: 0031.
■650 4▼aAtomic physics
■650 4▼aQuantum physics
■650 4▼aComputational physics
■653 ▼aBarium
■653 ▼aQuantum
■653 ▼aQubits
■653 ▼aTrapped ions
■653 ▼aRaman spectroscopy
■690 ▼a0748
■690 ▼a0599
■690 ▼a0216
■71020▼aUniversity of California, Los Angeles▼bPhysics 0666.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358347▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
