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On Schrodinger Equations With Non-Perturbative Potentials
On Schrodinger Equations With Non-Perturbative Potentials
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211151034
- ISBN
- 9798383350836
- DDC
- 510
- 저자명
- Black, Adam.
- 서명/저자
- On Schrodinger Equations With Non-Perturbative Potentials
- 발행사항
- [Sl] : Yale University, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 297 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-01, Section: B.
- 주기사항
- Advisor: Schlag, Wilhelm.
- 학위논문주기
- Thesis (Ph.D.)--Yale University, 2024.
- 초록/해제
- 요약This thesis consists of four parts, each studying a different class of Schrodinger equations. Though the setting and relevant questions vary between chapters, a theme that runs through all of them is the study of a Hamiltonian with a potential that is not small enough to be treated perturbatively. Indeed, in all of the Schrodinger equations below, the potential is, in some sense, large enough that it may affect the asymptotic behavior of the system.In Chapters 2 and 3, we investigate the scattering theory of Schrodinger operators with potentials that have anisotropic decay. More specifically, we assume that the potential in question decays in a short-range way, but only along a collection of rays in Rd. This generalizes the classical setting of short-range scattering in which the potential decays along all rays to infinity. For these operators, we give a dynamical characterization of the scattering states and a corresponding description of their complement. Heuristically, we show that any state decomposes into an asymptotically free piece and a piece that may interact with the potential for long times. Chapter 3 considers the general setting of anisotropic short-range potentials, whereas Chapter 2 focuses on potentials that are short-range outside of a subspace of Rd. In this latter case and others, we show a more refined description of the scattering states and their complement, which we call the surface subspace.The results of Chapters 2 and 3 are agnostic to the structure of the potential, so in Chapter 4 we specialize to potentials that are periodic in some coordinate directions and compactly supported in the others. For such potentials, we show that a dense set of states in the surface subspace exhibit directional ballistic transport. This means that they evolve ballistically in the directions in which the potential is periodic while being confined in the directions in which it decays.In Chapter 5, we study a Hamiltonian with a repulsive Coulomb potential on R3. We show that radial solutions of the corresponding Schrodinger equation obey an L1 → L∞ estimate with the natural 3/2 decay rate. To accomplish this, we compute the kernel of the evolution via a distorted Fourier transform and then perform a detailed analysis of its asymptotics.This thesis contains joint work with Tal Malinovitch, David Damanik, Giorgio Young, Ebru Toprak, Jiahua Zou, and Bruno Vergara.
- 일반주제명
- Mathematics
- 일반주제명
- Theoretical mathematics
- 일반주제명
- Applied mathematics
- 키워드
- Hamiltonian
- 기타저자
- Yale University Mathematics
- 기본자료저록
- Dissertations Abstracts International. 86-01B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
008250123s2024 us c eng d■001000017160522
■00520250211151034
■006m o d
■007cr#unu||||||||
■020 ▼a9798383350836
■035 ▼a(MiAaPQ)AAI30997468
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a510
■1001 ▼aBlack, Adam.
■24510▼aOn Schrodinger Equations With Non-Perturbative Potentials
■260 ▼a[Sl]▼bYale University▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a297 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-01, Section: B.
■500 ▼aAdvisor: Schlag, Wilhelm.
■5021 ▼aThesis (Ph.D.)--Yale University, 2024.
■520 ▼aThis thesis consists of four parts, each studying a different class of Schrodinger equations. Though the setting and relevant questions vary between chapters, a theme that runs through all of them is the study of a Hamiltonian with a potential that is not small enough to be treated perturbatively. Indeed, in all of the Schrodinger equations below, the potential is, in some sense, large enough that it may affect the asymptotic behavior of the system.In Chapters 2 and 3, we investigate the scattering theory of Schrodinger operators with potentials that have anisotropic decay. More specifically, we assume that the potential in question decays in a short-range way, but only along a collection of rays in Rd. This generalizes the classical setting of short-range scattering in which the potential decays along all rays to infinity. For these operators, we give a dynamical characterization of the scattering states and a corresponding description of their complement. Heuristically, we show that any state decomposes into an asymptotically free piece and a piece that may interact with the potential for long times. Chapter 3 considers the general setting of anisotropic short-range potentials, whereas Chapter 2 focuses on potentials that are short-range outside of a subspace of Rd. In this latter case and others, we show a more refined description of the scattering states and their complement, which we call the surface subspace.The results of Chapters 2 and 3 are agnostic to the structure of the potential, so in Chapter 4 we specialize to potentials that are periodic in some coordinate directions and compactly supported in the others. For such potentials, we show that a dense set of states in the surface subspace exhibit directional ballistic transport. This means that they evolve ballistically in the directions in which the potential is periodic while being confined in the directions in which it decays.In Chapter 5, we study a Hamiltonian with a repulsive Coulomb potential on R3. We show that radial solutions of the corresponding Schrodinger equation obey an L1 → L∞ estimate with the natural 3/2 decay rate. To accomplish this, we compute the kernel of the evolution via a distorted Fourier transform and then perform a detailed analysis of its asymptotics.This thesis contains joint work with Tal Malinovitch, David Damanik, Giorgio Young, Ebru Toprak, Jiahua Zou, and Bruno Vergara.
■590 ▼aSchool code: 0265.
■650 4▼aMathematics
■650 4▼aTheoretical mathematics
■650 4▼aApplied mathematics
■653 ▼aSchrodinger equations
■653 ▼aNon-perturbative potentials
■653 ▼aHamiltonian
■653 ▼aBallistic transport
■690 ▼a0405
■690 ▼a0642
■690 ▼a0364
■71020▼aYale University▼bMathematics.
■7730 ▼tDissertations Abstracts International▼g86-01B.
■790 ▼a0265
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17160522▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


