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Symmetry and Universality in Quantum Many-Body Systems
Symmetry and Universality in Quantum Many-Body Systems
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202104659
- ISBN
- 9798291544303
- DDC
- 530
- 서명/저자
- Symmetry and Universality in Quantum Many-Body Systems
- 발행사항
- [Sl] : University of California, Santa Barbara, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 242 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
- 주기사항
- Advisor: Xu, Cenke.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Santa Barbara, 2025.
- 초록/해제
- 요약This dissertation reports on recent novel results regarding symmetry and quantum critical phenomena in condensed matter and quantum many-body systems. Such systems, composed of many strongly-interacting degrees of freedom, are classified by their long-distance behavior captured by fixed-points of the Renormalization Group (RG) in a Quantum Field Theory (QFT) framework. Additionally, this universal long-distance physics is heavily constrained by generic properties of the system such as symmetries and their potential 't Hooft anomalies. In particular, we focus on two different kinds of such physics in this thesis.This text can be largely divided into two parts. The first part, which includes chapters 2 through 4, discusses statistical and quantum lattice models with "subsystem symmetries". Such symmetries come in two flavors: type-I, where the symmetry charge is supported on a regular submanifold and type-II, where the support of the symmetry charge is fractal instead. We explicitly construct quantum lattice models with type-II (or, fractal) subsystem symmetries composed of qudit or rotor degrees of freedom. These models may support gapped phases that spontaneously break fractal subsystem symmetries. A multicritical point endowed with such symmetry will be remarked upon in Chapter 3 and correlation functions in the ordered phases and at the multicritical point will be also discussed. An experimental proposal for realizing similar models in experimental platforms of Rydberg atoms will also be considered.The second part of this dissertation - contained in chapters 5 through 8 - will instead focus on classifying universal physics in open quantum systems, particularly those coupled to ancilla degrees of freedom without dynamics or a Markovian bath, for finite-time. These effects are realized as decoherence (or weak-measurement) acting on the original system, transforming the quantum wavefunction into a mixed state. The long-distance scaling of entanglement measures and other information-theoretic quantities may see marked change, signifying such mixed-states are examples of new unconventional quantum matter. An array of quantum many-body systems subjected to these effects, including quantum critical points and Chern insulators, will be discussed.
- 일반주제명
- Physics
- 일반주제명
- Condensed matter physics
- 일반주제명
- Quantum physics
- 일반주제명
- Theoretical physics
- 키워드
- Decoherence
- 키워드
- Topology
- 기타저자
- University of California, Santa Barbara Physics
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202104659
■006m o d
■007cr#unu||||||||
■020 ▼a9798291544303
■035 ▼a(MiAaPQ)AAI32116053
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aMyerson-Jain, Nayan.
■24510▼aSymmetry and Universality in Quantum Many-Body Systems
■260 ▼a[Sl]▼bUniversity of California, Santa Barbara▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a242 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-02, Section: B.
■500 ▼aAdvisor: Xu, Cenke.
■5021 ▼aThesis (Ph.D.)--University of California, Santa Barbara, 2025.
■520 ▼aThis dissertation reports on recent novel results regarding symmetry and quantum critical phenomena in condensed matter and quantum many-body systems. Such systems, composed of many strongly-interacting degrees of freedom, are classified by their long-distance behavior captured by fixed-points of the Renormalization Group (RG) in a Quantum Field Theory (QFT) framework. Additionally, this universal long-distance physics is heavily constrained by generic properties of the system such as symmetries and their potential 't Hooft anomalies. In particular, we focus on two different kinds of such physics in this thesis.This text can be largely divided into two parts. The first part, which includes chapters 2 through 4, discusses statistical and quantum lattice models with "subsystem symmetries". Such symmetries come in two flavors: type-I, where the symmetry charge is supported on a regular submanifold and type-II, where the support of the symmetry charge is fractal instead. We explicitly construct quantum lattice models with type-II (or, fractal) subsystem symmetries composed of qudit or rotor degrees of freedom. These models may support gapped phases that spontaneously break fractal subsystem symmetries. A multicritical point endowed with such symmetry will be remarked upon in Chapter 3 and correlation functions in the ordered phases and at the multicritical point will be also discussed. An experimental proposal for realizing similar models in experimental platforms of Rydberg atoms will also be considered.The second part of this dissertation - contained in chapters 5 through 8 - will instead focus on classifying universal physics in open quantum systems, particularly those coupled to ancilla degrees of freedom without dynamics or a Markovian bath, for finite-time. These effects are realized as decoherence (or weak-measurement) acting on the original system, transforming the quantum wavefunction into a mixed state. The long-distance scaling of entanglement measures and other information-theoretic quantities may see marked change, signifying such mixed-states are examples of new unconventional quantum matter. An array of quantum many-body systems subjected to these effects, including quantum critical points and Chern insulators, will be discussed.
■590 ▼aSchool code: 0035.
■650 4▼aPhysics
■650 4▼aCondensed matter physics
■650 4▼aQuantum physics
■650 4▼aTheoretical physics
■653 ▼aCritical phenomena
■653 ▼aDecoherence
■653 ▼aPhase transitions
■653 ▼aQuantum Field Theory
■653 ▼aQuantum information
■653 ▼aTopology
■690 ▼a0605
■690 ▼a0611
■690 ▼a0599
■690 ▼a0753
■71020▼aUniversity of California, Santa Barbara▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-02B.
■790 ▼a0035
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17358418▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


