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Dynamics and Universality of Many-Body Open Quantum Systems
Dynamics and Universality of Many-Body Open Quantum Systems
Detailed Information
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20260202105253
- ISBN
- 9798265451262
- DDC
- 530
- 저자명
- Kulkarni, Anish.
- 서명/저자
- Dynamics and Universality of Many-Body Open Quantum Systems
- 발행사항
- [Sl] : Princeton University, 2025
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2025
- 형태사항
- 208 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 87-06, Section: B.
- 주기사항
- Advisor: Ryu, Shinsei.
- 학위논문주기
- Thesis (Ph.D.)--Princeton University, 2025.
- 초록/해제
- 요약A quantum system is rarely isolated from its environment; in other words, it is open. It exchanges energy, particles, and other charges with its environment. Such dissipative processes fundamentally alter its dynamics. In mathematical terms, the time evolution becomes non-Unitary and can no longer be described by a Hermitian Hamiltonian. Thus, open systems exhibit new phenomena that do not occur in closed quantum systems. In this work, we study emergent phenomena in open many-body quantum systems. As prototypical examples of strongly interacting dissipative quantum matter, we analyze Lindbladian versions of the Sachdev-Ye-Kitaev (SYK) model. The steady-state Green's functions of these models display an overdamped to underdamped transition as dissipation strength is reduced. Reducing it further, we observe that the steady-state relaxation rate remains non-zero even as the dissipation strength vanishes. This is called anomalous dissipation and has since been established as a generic feature of many-body Lindbladians. To characterize far-from-equilibrium dynamics of these models we calculate the average Loschmidt echo starting from a random initial state. We find that the system undergoes dynamical phase transitions signalled by non-analytic behavior of the Loschmidt as a function of time. Using this data, we construct dynamical phase diagrams of these models which feature first- and second-order transitions as well as a dynamical crossover. After studying these collective phenomena at large system size, we analyze the symmetry properties of these models at finite system size. We build a periodic table of the SYK Lindbladians based on internal symmetry and the associated 38-fold classification scheme for non-Hermitian matrices. More generally, we construct all relevant internal symmetry operators for generic fermionic Lindbladians. Previously, it was conjectured based on numerical evidence that a particular internal symmetry, namely Time Reversal Symmetry† (TRS†), gives rise to two new universality classes for non-Hermitian quantum chaos. In our work we analytically calculate exact expressions for statistical properties of random matrices in these conjectured universality classes. Our results corroborate the universality conjecture and lay the foundation to rigorously quantify universal correlations in chaotic open quantum systems.
- 일반주제명
- Condensed matter physics
- 일반주제명
- Statistical physics
- 일반주제명
- Theoretical physics
- 일반주제명
- Physics
- 일반주제명
- Quantum physics
- 기타저자
- Princeton University Physics
- 기본자료저록
- Dissertations Abstracts International. 87-06B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105253
■006m o d
■007cr#unu||||||||
■020 ▼a9798265451262
■035 ▼a(MiAaPQ)AAI32277529
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a530
■1001 ▼aKulkarni, Anish.
■24510▼aDynamics and Universality of Many-Body Open Quantum Systems
■260 ▼a[Sl]▼bPrinceton University▼c2025
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2025
■300 ▼a208 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 87-06, Section: B.
■500 ▼aAdvisor: Ryu, Shinsei.
■5021 ▼aThesis (Ph.D.)--Princeton University, 2025.
■520 ▼aA quantum system is rarely isolated from its environment; in other words, it is open. It exchanges energy, particles, and other charges with its environment. Such dissipative processes fundamentally alter its dynamics. In mathematical terms, the time evolution becomes non-Unitary and can no longer be described by a Hermitian Hamiltonian. Thus, open systems exhibit new phenomena that do not occur in closed quantum systems. In this work, we study emergent phenomena in open many-body quantum systems. As prototypical examples of strongly interacting dissipative quantum matter, we analyze Lindbladian versions of the Sachdev-Ye-Kitaev (SYK) model. The steady-state Green's functions of these models display an overdamped to underdamped transition as dissipation strength is reduced. Reducing it further, we observe that the steady-state relaxation rate remains non-zero even as the dissipation strength vanishes. This is called anomalous dissipation and has since been established as a generic feature of many-body Lindbladians. To characterize far-from-equilibrium dynamics of these models we calculate the average Loschmidt echo starting from a random initial state. We find that the system undergoes dynamical phase transitions signalled by non-analytic behavior of the Loschmidt as a function of time. Using this data, we construct dynamical phase diagrams of these models which feature first- and second-order transitions as well as a dynamical crossover. After studying these collective phenomena at large system size, we analyze the symmetry properties of these models at finite system size. We build a periodic table of the SYK Lindbladians based on internal symmetry and the associated 38-fold classification scheme for non-Hermitian matrices. More generally, we construct all relevant internal symmetry operators for generic fermionic Lindbladians. Previously, it was conjectured based on numerical evidence that a particular internal symmetry, namely Time Reversal Symmetry† (TRS†), gives rise to two new universality classes for non-Hermitian quantum chaos. In our work we analytically calculate exact expressions for statistical properties of random matrices in these conjectured universality classes. Our results corroborate the universality conjecture and lay the foundation to rigorously quantify universal correlations in chaotic open quantum systems.
■590 ▼aSchool code: 0181.
■650 4▼aCondensed matter physics
■650 4▼aStatistical physics
■650 4▼aTheoretical physics
■650 4▼aPhysics
■650 4▼aQuantum physics
■653 ▼aNon-hermitian physics
■653 ▼aOpen quantum systems
■653 ▼aRandom matrix theory
■653 ▼aSachdev-Ye-Kitaev model
■690 ▼a0611
■690 ▼a0217
■690 ▼a0753
■690 ▼a0599
■690 ▼a0605
■71020▼aPrinceton University▼bPhysics.
■7730 ▼tDissertations Abstracts International▼g87-06B.
■790 ▼a0181
■791 ▼aPh.D.
■792 ▼a2025
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360029▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.
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