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Large Momentum Transfer and Spin Squeezing for Atom Interferometry
Large Momentum Transfer and Spin Squeezing for Atom Interferometry
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211150957
- ISBN
- 9798381977738
- DDC
- 530
- 저자명
- Li, Jinyang.
- 서명/저자
- Large Momentum Transfer and Spin Squeezing for Atom Interferometry
- 발행사항
- [Sl] : Northwestern University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 102 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
- 주기사항
- Includes supplementary digital materials.
- 주기사항
- Advisor: Shahriar, Selim.
- 학위논문주기
- Thesis (Ph.D.)--Northwestern University, 2024.
- 초록/해제
- 요약Atom interferometry is a preeminent method for inertial measurement, which can be used for inertial navigation and fundamental science including gravitational wave detection and equivalence principle test.Large momentum transfer (LMT) is a technique widely used to magnify the phase shift in an atom interferometer by increasing the effective wavenumber of the light pulses. Existing approaches to implement Raman-transition-based LMT all involve physically swapping the propagation directions of the two counterpropagating Raman beams repeatedly, which could significantly complicate the experimental system. In this dissertation, a simpler approach is proposed and an experimental demonstration is reported. This approach for Raman-transition-based LMT does not involve a physical swap of the directions of the Raman beams, which could potentially reduce the size and weight of the equipment, decrease the difficulty in optical path alignment, and increase the reliability.Spin squeezing is a technique that generates entanglement originally used for suppressing the quantum noise, which is significant only if the quantum noise is dominant. Later, it is realized that spin squeezing can be used to magnify the phase shift with echo squeezing protocols (ESPs). Magnifying the phase shift is significant whether the quantum noise or detection noise is dominant. However, the conventional ESP can only magnify the phase shift by the square root of the atom number. On the other hand, the ESPs employing the Schrodinger cat state can magnify the phase shift by a factor of the atom number, at the cost of high vulnerability to decoherence mechanisms. In this dissertation, the generalized ESP, which can magnify the phase shift by a factor from one to the number of atoms, is proposed. Therefore, one can balance the phase magnification and the vulnerability to the decoherence mechanisms by using the generalized ESP.To apply the ESPs to atom interferometry, a problem is that the two atomic states involved in squeezing have different momentum and are moving apart. The technique of using a hybrid of microwave and Raman pulses can solve this problem. Based on this technique, explicit protocols for applying ESPs to atom interferometers are proposed in this dissertation. Furthermore, explicit protocols augmented with the combination of LMT and spin squeezing are also illustrated in this dissertation.In the field of atomic physics, it is a common phenomenon that many conclusions are well known, while the fundamental theory and mathematical derivation underlying them cannot be easily found in literature, or the literature unnecessarily complicates the explanations. In this dissertation, a systematic summary of the fundamental theories for the interaction between electromagnetic waves and atoms is provided.
- 일반주제명
- Physics
- 일반주제명
- Atomic physics
- 일반주제명
- Nuclear physics
- 키워드
- Spin squeezing
- 기타저자
- Northwestern University Physics
- 기본자료저록
- Dissertations Abstracts International. 85-10B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017160323
■00520250211150957
■006m o d
■007cr#unu||||||||
■020 ▼a9798381977738
■035 ▼a(MiAaPQ)AAI30993670
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aLi, Jinyang.▼0(orcid)0000-0001-9432-8581
■24510▼aLarge Momentum Transfer and Spin Squeezing for Atom Interferometry
■260 ▼a[Sl]▼bNorthwestern University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a102 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 85-10, Section: B.
■500 ▼aIncludes supplementary digital materials.
■500 ▼aAdvisor: Shahriar, Selim.
■5021 ▼aThesis (Ph.D.)--Northwestern University, 2024.
■520 ▼aAtom interferometry is a preeminent method for inertial measurement, which can be used for inertial navigation and fundamental science including gravitational wave detection and equivalence principle test.Large momentum transfer (LMT) is a technique widely used to magnify the phase shift in an atom interferometer by increasing the effective wavenumber of the light pulses. Existing approaches to implement Raman-transition-based LMT all involve physically swapping the propagation directions of the two counterpropagating Raman beams repeatedly, which could significantly complicate the experimental system. In this dissertation, a simpler approach is proposed and an experimental demonstration is reported. This approach for Raman-transition-based LMT does not involve a physical swap of the directions of the Raman beams, which could potentially reduce the size and weight of the equipment, decrease the difficulty in optical path alignment, and increase the reliability.Spin squeezing is a technique that generates entanglement originally used for suppressing the quantum noise, which is significant only if the quantum noise is dominant. Later, it is realized that spin squeezing can be used to magnify the phase shift with echo squeezing protocols (ESPs). Magnifying the phase shift is significant whether the quantum noise or detection noise is dominant. However, the conventional ESP can only magnify the phase shift by the square root of the atom number. On the other hand, the ESPs employing the Schrodinger cat state can magnify the phase shift by a factor of the atom number, at the cost of high vulnerability to decoherence mechanisms. In this dissertation, the generalized ESP, which can magnify the phase shift by a factor from one to the number of atoms, is proposed. Therefore, one can balance the phase magnification and the vulnerability to the decoherence mechanisms by using the generalized ESP.To apply the ESPs to atom interferometry, a problem is that the two atomic states involved in squeezing have different momentum and are moving apart. The technique of using a hybrid of microwave and Raman pulses can solve this problem. Based on this technique, explicit protocols for applying ESPs to atom interferometers are proposed in this dissertation. Furthermore, explicit protocols augmented with the combination of LMT and spin squeezing are also illustrated in this dissertation.In the field of atomic physics, it is a common phenomenon that many conclusions are well known, while the fundamental theory and mathematical derivation underlying them cannot be easily found in literature, or the literature unnecessarily complicates the explanations. In this dissertation, a systematic summary of the fundamental theories for the interaction between electromagnetic waves and atoms is provided.
■590 ▼aSchool code: 0163.
■650 4▼aPhysics
■650 4▼aAtomic physics
■650 4▼aNuclear physics
■653 ▼aAtom interferometry
■653 ▼aLarge momentum transfer
■653 ▼aSpin squeezing
■653 ▼aEcho squeezing protocols
■690 ▼a0605
■690 ▼a0748
■690 ▼a0756
■71020▼aNorthwestern University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g85-10B.
■790 ▼a0163
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160323▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
