서브메뉴
검색
Programmable Fermi-Hubbard Physics in Optical Tweezers and Lattices
Programmable Fermi-Hubbard Physics in Optical Tweezers and Lattices
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202102945
- ISBN
- 9798280746671
- DDC
- 530
- 서명/저자
- Programmable Fermi-Hubbard Physics in Optical Tweezers and Lattices
- 발행사항
- [Sl] : Princeton University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 174 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-12, Section: B.
- 주기사항
- Advisor: Bakr, Waseem S.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2024.
- 초록/해제
- 요약Ultracold atoms in optical lattices are an ideal platform for studying itinerant models of quantum physics. In this thesis, we present two methods in which we explore physics beyond the square Fermi-Hubbard model, which has been the previous primary focus of fermion quantum gas microscopes. In the first part of this thesis, we seek to combine the programmability and single-site control of the optical tweezer array platform to study Fermi-Hubbard systems in tunnel-coupled arrays. In the second part of this thesis, we realize a triangular Fermi-Hubbard model with a programmable geometry by introducing an optical superlattice. Both methods allow for quantum state engineering to try to reach low entropy correlated states and the ability to study a variety of lattice geometries.We show the building blocks of the Fermi-Hubbard tweezer array platform by first demonstrating high-fidelity ground state preparation of many tweezers and the ability to create low disorder tunnel coupled regimes. In a variety of one and two-dimensional geometries with small system sizes, we show the flexibility of this platform by preparing correlated states with entropies comparable to state of the art in optical lattices. Dominated by entropy from loading defects, we implement a bilayer spin-charge readout scheme to post-select on only perfect initial states. However, we encounter challenges in scaling to larger numbers of tweezers. Future applications of this platform include use as a fermionic quantum processor. In the triangular Fermi-Hubbard model, realized with a passively stable optical superlattice, a novel form of quantum magnetism called kinetic magnetism is predicted even in the absence of superexchange interactions. Bulk properties of kinetic magnetism have been recently seen in moire materials, but an observation of the underlying microscopic physics is lacking. We directly observe magnetic polarons by measuring enhanced antiferromagnetic correlations in the local environment of a hole dopant. Around a charge dopant, we find ferromagnetic correlations, a manifestation of the elusive Nagaoka effect. Our results set the stage for spectroscopic experiments to study the dispersion of itinerant spin polarons and searches for polarons with more complex internal structure that may provide a route for high-temperature hole-pairing and superconductivity.
- 일반주제명
- Physics
- 일반주제명
- Quantum physics
- 일반주제명
- Condensed matter physics
- 일반주제명
- Atomic physics
- 키워드
- Ultracold atoms
- 키워드
- Entropy
- 키워드
- Optical tweezers
- 키워드
- Optical lattices
- 기타저자
- Princeton University Physics
- 기본자료저록
- Dissertations Abstracts International. 86-12B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008260126s2024 us c eng d■001000017356530
■00520260202102945
■006m o d
■007cr#unu||||||||
■020 ▼a9798280746671
■035 ▼a(MiAaPQ)AAI31334481
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aSpar, Benjamin M.
■24510▼aProgrammable Fermi-Hubbard Physics in Optical Tweezers and Lattices
■260 ▼a[Sl]▼bPrinceton University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a174 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-12, Section: B.
■500 ▼aAdvisor: Bakr, Waseem S.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2024.
■520 ▼aUltracold atoms in optical lattices are an ideal platform for studying itinerant models of quantum physics. In this thesis, we present two methods in which we explore physics beyond the square Fermi-Hubbard model, which has been the previous primary focus of fermion quantum gas microscopes. In the first part of this thesis, we seek to combine the programmability and single-site control of the optical tweezer array platform to study Fermi-Hubbard systems in tunnel-coupled arrays. In the second part of this thesis, we realize a triangular Fermi-Hubbard model with a programmable geometry by introducing an optical superlattice. Both methods allow for quantum state engineering to try to reach low entropy correlated states and the ability to study a variety of lattice geometries.We show the building blocks of the Fermi-Hubbard tweezer array platform by first demonstrating high-fidelity ground state preparation of many tweezers and the ability to create low disorder tunnel coupled regimes. In a variety of one and two-dimensional geometries with small system sizes, we show the flexibility of this platform by preparing correlated states with entropies comparable to state of the art in optical lattices. Dominated by entropy from loading defects, we implement a bilayer spin-charge readout scheme to post-select on only perfect initial states. However, we encounter challenges in scaling to larger numbers of tweezers. Future applications of this platform include use as a fermionic quantum processor. In the triangular Fermi-Hubbard model, realized with a passively stable optical superlattice, a novel form of quantum magnetism called kinetic magnetism is predicted even in the absence of superexchange interactions. Bulk properties of kinetic magnetism have been recently seen in moire materials, but an observation of the underlying microscopic physics is lacking. We directly observe magnetic polarons by measuring enhanced antiferromagnetic correlations in the local environment of a hole dopant. Around a charge dopant, we find ferromagnetic correlations, a manifestation of the elusive Nagaoka effect. Our results set the stage for spectroscopic experiments to study the dispersion of itinerant spin polarons and searches for polarons with more complex internal structure that may provide a route for high-temperature hole-pairing and superconductivity.
■590 ▼aSchool code: 0181.
■650 4▼aPhysics
■650 4▼aQuantum physics
■650 4▼aCondensed matter physics
■650 4▼aAtomic physics
■653 ▼aUltracold atoms
■653 ▼aEntropy
■653 ▼aSuperconductivity
■653 ▼aOptical tweezers
■653 ▼aOptical lattices
■690 ▼a0605
■690 ▼a0599
■690 ▼a0611
■690 ▼a0748
■71020▼aPrinceton University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g86-12B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17356530▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


