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Toward High-Cooperativity Spin-Magnetomechanics with Levitated Micromagnets
Toward High-Cooperativity Spin-Magnetomechanics with Levitated Micromagnets
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202103140
- ISBN
- 9798280720923
- DDC
- 530.1
- 서명/저자
- Toward High-Cooperativity Spin-Magnetomechanics with Levitated Micromagnets
- 발행사항
- [Sl] : Harvard University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 148 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Lukin, Mikhail.
- 학위논문주기
- Thesis (Ph.D.)--Harvard University, 2025.
- 초록/해제
- 요약Coupling high-quality mechanical resonators to strong quantum nonlinearities has become an exciting field of research in recent years. These systems offer prospects for long-range entanglement between spins, cooling a mechanical resonator to its ground state, and even production of non-Gaussian states of motion. In this thesis, I will present our progress toward the high-cooperativity regime in a spin-mechanics system. For our mechanical resonator, we levitate micromagnets over a planar type-II superconductor (YBCO). The mechanical modes offer excellent environmental isolation and a high magnetic field gradient-to-mass ratio. We choose to work with nitrogen-vacancy (NV) centers in diamond as our spin due to their long coherence times, large magnetic coupling, and optical initialization and readout. I will present three approaches. First, a characterization of our levitated system and measurement of the coupling to a translational degree of freedom in devices of magnets isolated in silicon pockets. Then, I will describe an approach to shrinking the length scales of the system with patterned NbTiN films on a diamond substrate. Finally, I will discuss coupling to a rotational degree of freedom with an improved platform of NV centers implanted in a diamond membrane (∼ μm thick) placed on a YBCO sample. In addition to these three iterations, I will discuss our investigation into the quality factor limitations of the mechanical resonator. Such improvements pave a clear path to the high-cooperativity regime and will enable near-term milestones such as the detection of a single spin by the levitated system, a gateway for future quantum applications.
- 일반주제명
- Quantum physics
- 일반주제명
- Atomic physics
- 일반주제명
- Condensed matter physics
- 일반주제명
- Electromagnetics
- 키워드
- Spin-mechanics
- 기타저자
- Harvard University Physics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202103140
■006m o d
■007cr#unu||||||||
■020 ▼a9798280720923
■035 ▼a(MiAaPQ)AAI31994044
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530.1
■1001 ▼aSchaefer, John DaLi.▼0(orcid)0000-0002-9370-700X
■24510▼aToward High-Cooperativity Spin-Magnetomechanics with Levitated Micromagnets
■260 ▼a[Sl]▼bHarvard University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a148 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Lukin, Mikhail.
■5021 ▼aThesis (Ph.D.)--Harvard University, 2025.
■520 ▼aCoupling high-quality mechanical resonators to strong quantum nonlinearities has become an exciting field of research in recent years. These systems offer prospects for long-range entanglement between spins, cooling a mechanical resonator to its ground state, and even production of non-Gaussian states of motion. In this thesis, I will present our progress toward the high-cooperativity regime in a spin-mechanics system. For our mechanical resonator, we levitate micromagnets over a planar type-II superconductor (YBCO). The mechanical modes offer excellent environmental isolation and a high magnetic field gradient-to-mass ratio. We choose to work with nitrogen-vacancy (NV) centers in diamond as our spin due to their long coherence times, large magnetic coupling, and optical initialization and readout. I will present three approaches. First, a characterization of our levitated system and measurement of the coupling to a translational degree of freedom in devices of magnets isolated in silicon pockets. Then, I will describe an approach to shrinking the length scales of the system with patterned NbTiN films on a diamond substrate. Finally, I will discuss coupling to a rotational degree of freedom with an improved platform of NV centers implanted in a diamond membrane (∼ μm thick) placed on a YBCO sample. In addition to these three iterations, I will discuss our investigation into the quality factor limitations of the mechanical resonator. Such improvements pave a clear path to the high-cooperativity regime and will enable near-term milestones such as the detection of a single spin by the levitated system, a gateway for future quantum applications.
■590 ▼aSchool code: 0084.
■650 4▼aQuantum physics
■650 4▼aAtomic physics
■650 4▼aCondensed matter physics
■650 4▼aElectromagnetics
■653 ▼aHybrid quantum systems
■653 ▼aLevitated systems
■653 ▼aMagnetic levitation
■653 ▼aMechanical resonators
■653 ▼aSpin-mechanics
■690 ▼a0599
■690 ▼a0748
■690 ▼a0611
■690 ▼a0607
■71020▼aHarvard University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0084
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17357157▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
